diff --git a/CHANGELOG.md b/CHANGELOG.md
index 2fb48a2da2..d9ad98397d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,12 @@
 # CHANGELOG
 
+## master
+
+Changes:
+
+- Adjust `Weight` alias detection (moved from `PortableRegistry` -> `Registry`)
+
+
 ## 9.12.1 Jan 22, 2023
 
 Changes:
diff --git a/packages/types/src/create/registry.spec.ts b/packages/types/src/create/registry.spec.ts
index 97998cabef..5ca208e0a7 100644
--- a/packages/types/src/create/registry.spec.ts
+++ b/packages/types/src/create/registry.spec.ts
@@ -19,8 +19,9 @@ describe('TypeRegistry', (): void => {
   });
 
   it('throws on non-existent via getOrThrow', (): void => {
-    expect((): CodecClass<Codec> => registry.getOrThrow('non-exist')).toThrow('type non-exist not found');
-    expect((): CodecClass<Codec> => registry.getOrThrow('non-exist', 'foo bar blah')).toThrow('foo bar blah');
+    expect(
+      (): CodecClass<Codec> => registry.getOrThrow('non-exist')
+    ).toThrow('type non-exist not found');
   });
 
   it('handles non exist type as Unknown (via getOrUnknown)', (): void => {
diff --git a/packages/types/src/create/registry.ts b/packages/types/src/create/registry.ts
index b7f3f79f73..975046b27b 100644
--- a/packages/types/src/create/registry.ts
+++ b/packages/types/src/create/registry.ts
@@ -4,7 +4,7 @@
 import type { AnyString, Codec, CodecClass, IU8a } from '@polkadot/types-codec/types';
 import type { CreateOptions, TypeDef } from '@polkadot/types-create/types';
 import type { ExtDef } from '../extrinsic/signedExtensions/types';
-import type { ChainProperties, DispatchErrorModule, DispatchErrorModuleU8, DispatchErrorModuleU8a, EventMetadataLatest, Hash, MetadataLatest, SiField, SiLookupTypeId, SiVariant } from '../interfaces/types';
+import type { ChainProperties, DispatchErrorModule, DispatchErrorModuleU8, DispatchErrorModuleU8a, EventMetadataLatest, Hash, MetadataLatest, SiField, SiLookupTypeId, SiVariant, WeightV2 } from '../interfaces/types';
 import type { CallFunction, CodecHasher, Definitions, DetectCodec, RegisteredTypes, Registry, RegistryError, RegistryTypes } from '../types';
 
 import { DoNotConstruct, Json, Raw } from '@polkadot/types-codec';
@@ -421,11 +421,11 @@ export class TypeRegistry implements Registry {
     return this.#knownTypes?.typesBundle?.spec?.[specName.toString()]?.instances?.[moduleName] || this.#moduleMap[moduleName];
   }
 
-  public getOrThrow <T extends Codec = Codec, K extends string = string, R = DetectCodec<T, K>> (name: K, msg?: string): CodecClass<R> {
+  public getOrThrow <T extends Codec = Codec, K extends string = string, R = DetectCodec<T, K>> (name: K): CodecClass<R> {
     const Clazz = this.get<T, K>(name);
 
     if (!Clazz) {
-      throw new Error(msg || `type ${name} not found`);
+      throw new Error(`type ${name} not found`);
     }
 
     return Clazz as unknown as CodecClass<R>;
@@ -478,11 +478,11 @@ export class TypeRegistry implements Registry {
 
       this.#classes.set(arg1, arg2);
     } else {
-      this._registerObject(arg1);
+      this.#registerObject(arg1);
     }
   }
 
-  private _registerObject (obj: RegistryTypes): void {
+  #registerObject = (obj: RegistryTypes): void => {
     const entries = Object.entries(obj);
 
     for (let e = 0; e < entries.length; e++) {
@@ -508,7 +508,7 @@ export class TypeRegistry implements Registry {
         this.#definitions.set(name, def);
       }
     }
-  }
+  };
 
   // sets the chain properties
   public setChainProperties (properties?: ChainProperties): void {
@@ -532,14 +532,38 @@ export class TypeRegistry implements Registry {
     lookup.register();
   }
 
+  // register alias types alongside the portable/lookup setup
+  // (we don't combine this into setLookup since that would/could
+  // affect stand-along lookups, such as ABIs which don't have
+  // actual on-chain metadata)
+  #registerLookup = (lookup: PortableRegistry): void => {
+    // attach the lookup before we register any types
+    this.setLookup(lookup);
+
+    // default to V1 - this includes 1.5 (with single field)
+    let weightType = 'WeightV1';
+    const Clazz = this.get<WeightV2>('SpWeightsWeightV2Weight');
+
+    // detection for WeightV2 type
+    if (Clazz) {
+      const weight = new Clazz(this);
+
+      if (weight.refTime && weight.proofSize) {
+        weightType = 'SpWeightsWeightV2Weight';
+      }
+    }
+
+    this.register({ Weight: weightType });
+  };
+
   // sets the metadata
   public setMetadata (metadata: Metadata, signedExtensions?: string[], userExtensions?: ExtDef): void {
     this.#metadata = metadata.asLatest;
     this.#metadataVersion = metadata.version;
     this.#firstCallIndex = null;
 
-    // attach the lookup at this point (before injecting)
-    this.setLookup(this.#metadata.lookup);
+    // attach the lookup at this point and register relevant types (before injecting)
+    this.#registerLookup(this.#metadata.lookup);
 
     injectExtrinsics(this, this.#metadata, this.#metadataVersion, this.#metadataCalls, this.#moduleMap);
     injectErrors(this, this.#metadata, this.#metadataVersion, this.#metadataErrors);
diff --git a/packages/types/src/metadata/PortableRegistry/PortableRegistry.ts b/packages/types/src/metadata/PortableRegistry/PortableRegistry.ts
index ef59b0468d..62a38e3881 100644
--- a/packages/types/src/metadata/PortableRegistry/PortableRegistry.ts
+++ b/packages/types/src/metadata/PortableRegistry/PortableRegistry.ts
@@ -422,27 +422,6 @@ function registerTypes (lookup: PortableRegistry, lookups: Record<string, string
         : names[sigParam.type.unwrap().toNumber()] || 'MultiSignature'
     });
   }
-
-  // handle weight overrides
-  if (params.SpWeightsWeightV2Weight) {
-    const weight = Object
-      .entries(names)
-      .find(([, n]) => n === 'SpWeightsWeightV2Weight');
-
-    if (!weight) {
-      throw new Error('Unable to extract weight type from SpWeightsWeightV2Weight');
-    }
-
-    const weightDef = lookup.getTypeDef(`Lookup${weight[0]}`);
-
-    lookup.registry.register({
-      Weight: Array.isArray(weightDef.sub) && weightDef.sub.length !== 1
-        // we have a complex structure
-        ? 'SpWeightsWeightV2Weight'
-        // single entry, fallback to weight V1
-        : 'WeightV1'
-    });
-  }
 }
 
 // this extracts aliases based on what we know the runtime config looks like in a