diff --git a/__recipes__/index.test.ts b/__recipes__/index.test.ts
index b97c6a8..1a5667b 100644
--- a/__recipes__/index.test.ts
+++ b/__recipes__/index.test.ts
@@ -5,17 +5,15 @@ import type {ClassHash, ReactClassNaming} from "react-classnaming"
 declare module "react-classnaming" {
   namespace ReactClassNaming {
     interface BemOptions {
-      elementDelimiter: "_";
+      // TODO #30 elementDelimiter: "_";
       modDelimiter: "-";
-      blockModKey: "&";
     }
   }
 }
 
 setOptions({
-  elementDelimiter: "_",
+  // TODO #30 elementDelimiter: "_",
   modDelimiter: "-",
-  blockModKey: "&"
 })
 
 type CssModule = Record<
diff --git a/__sandbox__/bem--old.ts b/__sandbox__/bem--old.ts
deleted file mode 100644
index 1648118..0000000
--- a/__sandbox__/bem--old.ts
+++ /dev/null
@@ -1,85 +0,0 @@
-// Can be used on #30
-
-import type { Ever0, Extends, PartDeep, Strip } from "src/ts-swiss.types"
-import type {ReactClassNaming} from "../src"
-
-export type BemQuery<
-  classes extends string,
-  delE extends string = "elementDelimiter" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["elementDelimiter"]
-  : ReactClassNaming.BemOptions["$default"]["elementDelimiter"],
-  delM extends string = "modDelimiter" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["modDelimiter"]
-  : ReactClassNaming.BemOptions["$default"]["modDelimiter"],
-  bModKey extends string = "blockModKey" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["blockModKey"]
-  : ReactClassNaming.BemOptions["$default"]["blockModKey"],
-> = string extends classes ? BemInGeneral : PartDeep<{
-  [b in Strip<Strip<classes, delM>, delE>]: boolean
-  | Exclude<MVs<classes, b, bModKey>, `${string}${delM}${string}`>
-  | (
-    Extends<classes, `${b}${delE | delM}${string}`, 
-      {
-        [e in Elements<classes, b>]: boolean
-        | Exclude<MVs<classes, b, e>, `${string}${delM}${string}`>
-        | (
-          {[m in Strip<MVs<classes, b, e>, delM>]: 
-            false | (
-              Ever0<
-                classes extends `${b}${
-                  e extends bModKey ? "" : `${delE}${e}`
-                }${delM}${m}${delM}${infer V}`
-                ? V : never,
-                true
-              >
-            )
-          }
-        )
-      }
-    >
-  )
-}>
-
-type Elements<
-  classes extends string,
-  b extends string,
-  delE extends string = "elementDelimiter" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["elementDelimiter"]
-  : ReactClassNaming.BemOptions["$default"]["elementDelimiter"],
-  delM extends string = "modDelimiter" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["modDelimiter"]
-  : ReactClassNaming.BemOptions["$default"]["modDelimiter"],
-  bModKey extends string = "blockModKey" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["blockModKey"]
-  : ReactClassNaming.BemOptions["$default"]["blockModKey"],
-> = classes extends `${b}${delE}${infer E}`
-? Strip<E, delM>
-: classes extends `${b}${delM}${string}`
-? bModKey
-: never
-
-type MVs<
-  classes extends string,
-  b extends string,
-  e extends string,
-  delE extends string = "elementDelimiter" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["elementDelimiter"]
-  : ReactClassNaming.BemOptions["$default"]["elementDelimiter"],
-  delM extends string = "modDelimiter" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["modDelimiter"]
-  : ReactClassNaming.BemOptions["$default"]["modDelimiter"],
-  bModKey extends string = "blockModKey" extends keyof ReactClassNaming.BemOptions
-  ? ReactClassNaming.BemOptions["blockModKey"]
-  : ReactClassNaming.BemOptions["$default"]["blockModKey"],
-> = classes extends `${b}${
-  e extends bModKey ? "" : `${delE}${e}`
-}${delM}${infer MV}` ? MV : never
-
-export type BemInGeneral = {
-  [block: string]: undefined | boolean | string | {
-    [el: string]: undefined | boolean | string
-    | {
-      [mod: string]: undefined | boolean | string
-    }
-  }
-}
diff --git a/__sandbox__/bem.test.ts b/__sandbox__/bem.test.ts
index dfe2eca..ecf60ea 100644
--- a/__sandbox__/bem.test.ts
+++ b/__sandbox__/bem.test.ts
@@ -1,4 +1,5 @@
-// import { Primitive } from "react-classnaming/ts-swiss.defs"
+import type { Ever0, Extends, PartDeep } from "src/ts-swiss.types"
+import type {ReactClassNaming} from "../src"
 import { CssModule } from "../src/definitions.types"
 
 it("tree2classes", () => {
@@ -149,50 +150,106 @@ describe("upon delimiter", () => {
   })
   
   it("query", () => {
+    // Can be used on #30
+
+    type Elements<
+        classes extends string,
+        b extends string,
+        delE extends string = "__" /*"elementDelimiter" extends keyof ReactClassNaming.BemOptions
+        ? ReactClassNaming.BemOptions["elementDelimiter"]
+        : ReactClassNaming.BemOptions["$default"]["elementDelimiter"]*/,
+        delM extends string = "modDelimiter" extends keyof ReactClassNaming.BemOptions
+        ? ReactClassNaming.BemOptions["modDelimiter"]
+        : ReactClassNaming.BemOptions["$default"]["modDelimiter"],
+        bModKey extends string = "$" /*"blockModKey" extends keyof ReactClassNaming.BemOptions
+        ? ReactClassNaming.BemOptions["blockModKey"]
+        : ReactClassNaming.BemOptions["$default"]["blockModKey"]*/  
+      > = classes extends `${b}${delE}${infer E}`
+      ? Strip<E, delM>
+      : classes extends `${b}${delM}${string}`
+      ? bModKey
+      : never
+
     type BemQuery<
-      bModKey extends string,
-      delE extends string,
-      delM extends string,
       classes extends string,
-      BE extends string,
-      Block extends string
-    > = {
-      [b in Block]?: boolean | (
-        {
-          [bmKey in bModKey]?: {
-            [
-              m in classes extends `${b}${delM}${infer MV}`
-              ? MV extends `${infer M}${delM}${infer _}` ? M : MV
-              : never
-            ]?: classes extends `${b}${delM}${m}${delM}${infer V}`
-            ? false|V
-            : boolean
+      delE extends string = "__" /*"elementDelimiter" extends keyof ReactClassNaming.BemOptions
+      ? ReactClassNaming.BemOptions["elementDelimiter"]
+      : ReactClassNaming.BemOptions["$default"]["elementDelimiter"]*/,
+      delM extends string = "modDelimiter" extends keyof ReactClassNaming.BemOptions
+      ? ReactClassNaming.BemOptions["modDelimiter"]
+      : ReactClassNaming.BemOptions["$default"]["modDelimiter"],
+      bModKey extends string = "$" /*"blockModKey" extends keyof ReactClassNaming.BemOptions
+      ? ReactClassNaming.BemOptions["blockModKey"]
+      : ReactClassNaming.BemOptions["$default"]["blockModKey"]*/
+    > = string extends classes ? BemInGeneral : PartDeep<{
+      [b in Strip<Strip<classes, delM>, delE>]: boolean
+      | Exclude<MVs<classes, b, bModKey>, `${string}${delM}${string}`>
+      | (
+        Extends<classes, `${b}${delE | delM}${string}`, 
+          {
+            [e in Elements<classes, b>]: boolean
+            | Exclude<MVs<classes, b, e>, `${string}${delM}${string}`>
+            | (
+              {[m in Strip<MVs<classes, b, e>, delM>]: 
+                false | (
+                  Ever0<
+                    classes extends `${b}${
+                      e extends bModKey ? "" : `${delE}${e}`
+                    }${delM}${m}${delM}${infer V}`
+                    ? V : never,
+                    true
+                  >
+                )
+              }
+            )
           }
-        } & {
-        [e in BE extends `${b}${delE}${infer E}` ? E : never]?: boolean | {
-          [
-            m in classes extends `${b}${delE}${e}${delM}${infer M}${delM}${infer _}`
-            ? M
-            : classes extends `${b}${delE}${e}${delM}${infer M}`
-            ? M
-            : never
-          ]?: classes extends `${b}${delE}${e}${delM}${m}${delM}${infer V}`
-            ? false|V
-            : boolean
-          
+        >
+      )
+    }> 
+    
+    type MVs<
+      classes extends string,
+      b extends string,
+      e extends string,
+      delE extends string = "__" /*"elementDelimiter" extends keyof ReactClassNaming.BemOptions
+      ? ReactClassNaming.BemOptions["elementDelimiter"]
+      : ReactClassNaming.BemOptions["$default"]["elementDelimiter"]*/,
+      delM extends string = "modDelimiter" extends keyof ReactClassNaming.BemOptions
+      ? ReactClassNaming.BemOptions["modDelimiter"]
+      : ReactClassNaming.BemOptions["$default"]["modDelimiter"],
+      bModKey extends string = "$" /*"blockModKey" extends keyof ReactClassNaming.BemOptions
+      ? ReactClassNaming.BemOptions["blockModKey"]
+      : ReactClassNaming.BemOptions["$default"]["blockModKey"]*/
+    > = classes extends `${b}${
+      e extends bModKey ? "" : `${delE}${e}`
+    }${delM}${infer MV}` ? MV : never
+    
+    type BemInGeneral = {
+      [block: string]: undefined | boolean | string | {
+        [el: string]: undefined | boolean | string
+        | {
+          [mod: string]: undefined | boolean | string
         }
-      })
-    }    
+      }
+    }
+      
     type BemQuerier<
       ClassNames extends CssModule,
-      bModKey extends string = "$",
       delE extends string = "__",
-      delM extends string = "--"
+      delM extends string = "--",
+      bModKey extends string = "$",
     > = 
     <
       // classes extends keyof ClassNames,
-      BE extends StripFromObj<ClassNames, delM>,
-      Q extends BemQuery<bModKey, delE, delM, keyof ClassNames, BE, Strip<BE, delE>>
+      // BE extends StripFromObj<ClassNames, delM>,
+      Q extends BemQuery<
+        keyof ClassNames,
+        delE,
+        delM,
+        bModKey        
+        // BE,
+        // Strip<BE, delE>
+      >
     >(arg: Q) => {[K in 
       {[b in keyof Q]: Q[b] extends boolean ? b : never}[keyof Q]
       // | {[b in keyof Q]: Q[b] extends Primitive ? never : `${b}${delE}${keyof Q[b]}`}[keyof Q]
@@ -211,46 +268,7 @@ describe("upon delimiter", () => {
     ]: boolean}
 
     //@ts-expect-error
-    const q: BemQuerier<ClassNames> = x => {
-      const $result: Record<string, undefined|boolean> = {}
-
-      for (const block in x) {
-        const bVal = x[block]
-        
-        if (!bVal) {
-          //@ts-expect-error
-          $result[block] = bVal
-          continue
-        }
-
-        for (const el in bVal) {
-          //@ts-expect-error
-          const eVal = bVal[el]
-          , be = el === "$" ? block : `${block}__${el}`
-          
-          if (!eVal) {
-            $result[be] = eVal
-            continue
-          }
-
-          $result[be] = true
-
-          for (const mod in eVal) {
-            const value: string|boolean = eVal[mod]
-            switch (typeof value) {
-              case "boolean": 
-                $result[`${be}--${mod}`] = value
-                break 
-              case "string":
-                $result[`${be}--${mod}--${value}`] = true
-                break
-            }
-          }
-        }
-      }
-
-      return $result
-    }
+    const q = x => x as unknown as BemQuerier<ClassNames> 
     , res = q({
       "App": {
         "Header": false,
@@ -272,24 +290,25 @@ describe("upon delimiter", () => {
     })
     , typeCheck: Record<string, typeof res> = {
       "exact": {
+        //@ts-expect-error
         Footer: true,
         Btn: true,
         App: true,
       }
     }
 
-    expect(res).toStrictEqual({
-      "App__Container": true,
-      "App__Container--loading": true,
-      "App__Container--status--error": true,
-      "App__Header": false,
-      "Btn": true,
-      "Btn--disabled": false,
-      "Btn--info--error": true,      
-      "Btn__Icon": true,
-      "Btn__Icon--big": true,
-      "Footer": false,
-    })
+    // expect(res).toStrictEqual({
+    //   "App__Container": true,
+    //   "App__Container--loading": true,
+    //   "App__Container--status--error": true,
+    //   "App__Header": false,
+    //   "Btn": true,
+    //   "Btn--disabled": false,
+    //   "Btn--info--error": true,      
+    //   "Btn__Icon": true,
+    //   "Btn__Icon--big": true,
+    //   "Footer": false,
+    // })
     expect(typeCheck).toBeInstanceOf(Object)
   })
 })
diff --git a/src/bem.core.test.ts b/src/bem.core.test.ts
index 9c57fc9..8a63c8d 100644
--- a/src/bem.core.test.ts
+++ b/src/bem.core.test.ts
@@ -36,9 +36,8 @@ describe(bem2arr.name, () => {
 
 describe("optioning", () => {
   const defaultOpts: BemOptions = {
-    elementDelimiter: "__",
+    // TODO #30 elementDelimiter: "__",
     modDelimiter: "--",
-    blockModKey: "$"
   }
 
   it("default", () => expect(
@@ -57,9 +56,8 @@ describe("optioning", () => {
   it("set another", () => {
     //TODO #29 test bem with not default options
     const opts: BemOptions = {
-      elementDelimiter: "_",
+      // TODO #30 elementDelimiter: "_",
       modDelimiter: "-",
-      blockModKey: "$"
     }
     setOptions(opts)
 
diff --git a/src/bem.core.ts b/src/bem.core.ts
index 5584a66..f621ec0 100644
--- a/src/bem.core.ts
+++ b/src/bem.core.ts
@@ -1,13 +1,11 @@
 import type { BemInGeneral } from "./bem.types"
 
 let modDelimiter = "--"
-, elementDelimiter = "__"
-, blockModKey = "$"
+// TODO #30 , elementDelimiter = "__"
 
 export type BemOptions = {
-  elementDelimiter: string
+  // TODO #30 elementDelimiter: string
   modDelimiter: string
-  blockModKey: string
 }
 
 export {
@@ -48,19 +46,15 @@ function bem2arr(query: BemInGeneral) {
 }
 
 function setOptions({
-  elementDelimiter: elD = elementDelimiter,
-  modDelimiter: modDel = modDelimiter,
-  blockModKey: modKey = blockModKey
+  // TODO #30 elementDelimiter: elD = elementDelimiter,
+  modDelimiter: modDel = modDelimiter
 }: Partial<BemOptions>) {
-  elementDelimiter = elD
   modDelimiter = modDel
-  blockModKey = modKey
 }
 
 function getOptions() {
   return {
-    elementDelimiter,
+    // TODO #30 elementDelimiter,
     modDelimiter,
-    blockModKey
   }
 }
\ No newline at end of file
diff --git a/src/index.ts b/src/index.ts
index 92fc4c7..ecbec70 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -18,9 +18,8 @@ export { setOptions } from "./bem.core"
 export declare namespace ReactClassNaming {
   export interface BemOptions {
     $default: {
-      elementDelimiter: "__"
+      // TODO #30 elementDelimiter: "__"
       modDelimiter: "--"
-      blockModKey: "$"  
     } 
   }  
 }