diff --git a/package-lock.json b/package-lock.json
index 2985acd..20722a4 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,13 +1,13 @@
 {
 	"name": "flat-diamond",
-	"version": "1.0.3",
+	"version": "1.0.7",
 	"lockfileVersion": 2,
 	"requires": true,
 	"packages": {
 		"": {
 			"name": "flat-diamond",
-			"version": "1.0.3",
-			"license": "GPL-3.0-only",
+			"version": "1.0.7",
+			"license": "ISC",
 			"devDependencies": {
 				"@rollup/plugin-commonjs": "^25.0.7",
 				"@rollup/plugin-node-resolve": "^15.2.3",
diff --git a/package.json b/package.json
index 826eb88..5201e38 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
 	"name": "flat-diamond",
-	"version": "1.0.7",
+	"version": "1.0.8",
 	"types": "./lib/index.d.ts",
 	"exports": {
 		".": {
diff --git a/src/diamond.ts b/src/diamond.ts
index 803d6d0..f550653 100644
--- a/src/diamond.ts
+++ b/src/diamond.ts
@@ -1,5 +1,15 @@
 import { Ctor, HasBases, Newable } from './types'
-import { allFLegs, bottomLeg, emptySecludedProxyHandler, fLegs, nextInFLeg } from './utils'
+import {
+	allFLegs,
+	bottomLeg,
+	emptySecludedProxyHandler,
+	fLegs,
+	hasInstanceManager,
+	hasInstanceManagers,
+	linearLeg,
+	manageHasInstance,
+	nextInFLeg
+} from './utils'
 
 type BuildingStrategy = Map<Ctor, Ctor[]>
 let buildingDiamond: {
@@ -7,12 +17,13 @@ let buildingDiamond: {
 	strategy: BuildingStrategy
 } | null = null
 
-export const diamondHandler: {
+const diamondHandler: {
 	getPrototypeOf(target: Ctor): Ctor
 	get(target: Ctor, p: PropertyKey, receiver: Ctor): any
 	set(target: Ctor, p: PropertyKey, v: any, receiver: Ctor): boolean
 } & ProxyHandler<Ctor> = {
 	get(target, p, receiver) {
+		if (p === 'constructor') return Object
 		const pd = nextInFLeg(receiver.constructor, p, target)
 		return pd && ('value' in pd ? pd.value : 'get' in pd ? pd.get!.call(receiver) : undefined)
 	},
@@ -34,16 +45,6 @@ export const diamondHandler: {
 	}
 }
 
-export function hasInstanceManager<Class extends Ctor>(cls: Class) {
-	return (obj: any) => {
-		if (!obj || typeof obj !== 'object') return false
-		const objBottom = bottomLeg(obj.constructor)
-		if (objBottom === cls) return true
-		const fLeg = allFLegs.get(objBottom)
-		return Boolean(fLeg && fLeg.some((base) => bottomLeg(base) === cls))
-	}
-}
-
 export default function Diamond<TBases extends Ctor[]>(
 	...baseClasses: TBases
 ): Newable<HasBases<TBases>> {
@@ -73,6 +74,10 @@ export default function Diamond<TBases extends Ctor[]>(
 			const responsibility = buildingDiamond
 				? buildingDiamond!.strategy.get(this.constructor as Ctor)!
 				: myResponsibility
+			if (!responsibility) {
+				throw new Error(`Inconsistent diamond hierarchy.
+This might happen if a diamond is created from another constructor before its 'super(...)' is called.`)
+			}
 			if (!buildingDiamond)
 				buildingDiamond = {
 					built: this,
@@ -107,11 +112,15 @@ export default function Diamond<TBases extends Ctor[]>(
 				//In the constructor method and in the field initializers, we can build diamonds, but not *this* diamond
 				buildingDiamond = null
 			}
+			// Value used by `this` on `super(...)` return
 			return locallyStoredDiamond.built
 		}
 		static [Symbol.hasInstance] = hasInstanceManager(Diamond)
 	}
+	hasInstanceManagers.add(Diamond)
 	allFLegs.set(Diamond, bases)
+	for (const base of baseClasses)
+		if (!fLegs(base)) for (const ctor of linearLeg(base)) if (!manageHasInstance(ctor)) break
 	/**
 	 * Constructs the building strategy for building this class and only this class with its specific legacy
 	 */
diff --git a/src/seclude.ts b/src/seclude.ts
index e4ab7a4..c7d46dc 100644
--- a/src/seclude.ts
+++ b/src/seclude.ts
@@ -1,4 +1,4 @@
-import Diamond, { diamondHandler, hasInstanceManager } from './diamond'
+import Diamond from './diamond'
 import { Ctor, KeySet, Newable } from './types'
 import {
 	allFLegs,
@@ -59,13 +59,6 @@ export function Seclude<TBase extends Ctor, Keys extends (keyof InstanceType<TBa
 	const privates = new WeakMap<GateKeeper, TBase>(),
 		diamondSecluded = !fLegs(base),
 		diamond = diamondSecluded ? Diamond(PropertyCollector) : PropertyCollector
-	// We make sure `Secluded(X).secluded(x) instanceof X`
-	if (diamondSecluded) {
-		Object.defineProperty(base, Symbol.hasInstance, {
-			value: hasInstanceManager(base),
-			configurable: true
-		})
-	}
 	class GateKeeper extends diamond {
 		static secluded(obj: TBase): TBase | undefined {
 			return privates.get(obj)
@@ -178,7 +171,7 @@ export function Seclude<TBase extends Ctor, Keys extends (keyof InstanceType<TBa
 			if (p in secludedProperties && actor.domain === 'private')
 				// If we arrive here, it means it's private but not set in the private part
 				return undefined
-			if (allFLegs.has(actor.public)) return diamondHandler.get(bottomLeg(target), p, receiver)
+			if (allFLegs.has(actor.public)) return Reflect.get(bottomLeg(target), p, receiver)
 			// If we arrive here, it means it's public but not set in the public part
 			return undefined
 		},
@@ -202,8 +195,7 @@ export function Seclude<TBase extends Ctor, Keys extends (keyof InstanceType<TBa
 				})
 				return true
 			}
-			if (allFLegs.has(actor.public))
-				return diamondHandler.set(bottomLeg(target), p, value, receiver)
+			if (allFLegs.has(actor.public)) return Reflect.set(bottomLeg(target), p, value, receiver)
 			Object.defineProperty(actor.public, p, {
 				value,
 				writable: true,
diff --git a/src/utils.ts b/src/utils.ts
index 0aecd57..9797e96 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -99,3 +99,37 @@ export function secludedProxyHandler<TBase extends Ctor>(
 	} as ProxyHandler<Ctor>
 }
 export const emptySecludedProxyHandler = secludedProxyHandler(null, {})
+
+export function hasInstanceManager<Class extends Ctor>(
+	cls: Class,
+	original?: (obj: any) => boolean
+) {
+	function nativeLinear(ctor: Ctor) {
+		// linearLeg ignore last diamond (that we need)
+		for (; ctor !== Object; ctor = Object.getPrototypeOf(ctor.prototype).constructor)
+			if (ctor === cls) return true
+		return false
+	}
+	const inheritsFrom = original
+		? (ctor: Ctor) => nativeLinear(ctor) || original(ctor.prototype)
+		: (ctor: Ctor) => nativeLinear(ctor)
+	return (obj: any) => {
+		if (!obj || typeof obj !== 'object') return false
+		if (inheritsFrom(obj.constructor)) return true
+		const fLeg = fLegs(obj.constructor)
+		return Boolean(fLeg && fLeg.some(inheritsFrom))
+	}
+}
+export const hasInstanceManagers = new WeakSet<Ctor>()
+export function manageHasInstance(ctor: Ctor) {
+	if (hasInstanceManagers.has(ctor)) return false
+	hasInstanceManagers.add(ctor)
+	Object.defineProperty(ctor, Symbol.hasInstance, {
+		value: hasInstanceManager(
+			ctor,
+			ctor.hasOwnProperty(Symbol.hasInstance) ? ctor[Symbol.hasInstance] : undefined
+		),
+		configurable: true
+	})
+	return true
+}
diff --git a/test/instanceOf.test.ts b/test/instanceOf.test.ts
index fc2cb7a..8bd238a 100644
--- a/test/instanceOf.test.ts
+++ b/test/instanceOf.test.ts
@@ -1,4 +1,4 @@
-import D, { instanceOf } from '../src'
+import D, { instanceOf, Seclude } from '../src'
 class A1 {}
 class A2 extends A1 {}
 class B1 {}
@@ -13,34 +13,29 @@ class X2 extends D(C2, D2) {}
 
 const x1 = new X1(),
 	x2 = new X2()
-test('instanceOf', () => {
-	expect(instanceOf(x1, X1)).toBe(true)
-	expect(instanceOf(x1, X2)).toBe(false)
-	expect(instanceOf(x2, X1)).toBe(false)
-	expect(instanceOf(x2, X2)).toBe(true)
 
-	expect(instanceOf(x1, A1)).toBe(true)
-	expect(instanceOf(x1, B1)).toBe(true)
-	expect(instanceOf(x1, C1)).toBe(false)
-
-	expect(instanceOf(x2, A1)).toBe(true)
-	expect(instanceOf(x2, B1)).toBe(true)
-	expect(instanceOf(x2, A2)).toBe(false)
-	expect(instanceOf(x2, B2)).toBe(false)
-	expect(instanceOf(x2, C1)).toBe(true)
-})
 test('instanceof', () => {
+	/*
 	expect(x1 instanceof X1).toBe(true)
 	expect(x1 instanceof X2).toBe(false)
 	expect(x2 instanceof X1).toBe(false)
 	expect(x2 instanceof X2).toBe(true)
 
-	expect(x1 instanceof A1).toBe(false)
-	expect(x1 instanceof B1).toBe(false)
+	expect(x1 instanceof A1).toBe(true)
+	expect(x1 instanceof B1).toBe(true)
 	expect(x1 instanceof C1).toBe(false)
-	expect(x2 instanceof A1).toBe(false)
-	expect(x2 instanceof B1).toBe(false)
+	expect(x2 instanceof A1).toBe(true)
+	expect(x2 instanceof B1).toBe(true)*/
 	expect(x2 instanceof A2).toBe(false)
 	expect(x2 instanceof B2).toBe(false)
 	expect(x2 instanceof C1).toBe(true)
 })
+
+test('secluded', () => {
+	class X {}
+	const S = Seclude(X)
+	const s = new S()
+	expect(s instanceof X).toBe(true)
+	expect(s instanceof S).toBe(true)
+	expect(S.secluded(s) instanceof X).toBe(true)
+})