diff --git a/.changeset/beige-days-grin.md b/.changeset/beige-days-grin.md
new file mode 100644
index 0000000000..20df82e5bb
--- /dev/null
+++ b/.changeset/beige-days-grin.md
@@ -0,0 +1,6 @@
+---
+"grafast": patch
+---
+
+Add `setParams` helper to loadOne/loadMany to save having to call `setParam`
+multiple times.
diff --git a/.changeset/big-crews-sniff.md b/.changeset/big-crews-sniff.md
new file mode 100644
index 0000000000..ced8a3083c
--- /dev/null
+++ b/.changeset/big-crews-sniff.md
@@ -0,0 +1,5 @@
+---
+"grafast": patch
+---
+
+Fix type mistake in loadManyLoader
diff --git a/.changeset/red-maps-fall.md b/.changeset/red-maps-fall.md
new file mode 100644
index 0000000000..152e2043f4
--- /dev/null
+++ b/.changeset/red-maps-fall.md
@@ -0,0 +1,5 @@
+---
+"graphile-build": patch
+---
+
+Minor error message fix.
diff --git a/grafast/grafast/src/steps/loadMany.ts b/grafast/grafast/src/steps/loadMany.ts
index bd8746c846..421119a71b 100644
--- a/grafast/grafast/src/steps/loadMany.ts
+++ b/grafast/grafast/src/steps/loadMany.ts
@@ -77,7 +77,7 @@ export function loadManyCallback<
  * LoadManyLoader.
  */
 export function loadManyLoader<
-  const TLookup extends Multistep,
+  const TSpec,
   TItem,
   TData extends Maybe<ReadonlyArrayOrAsyncIterable<Maybe<TItem>>> = Maybe<
     ReadonlyArrayOrAsyncIterable<Maybe<TItem>>
@@ -85,8 +85,8 @@ export function loadManyLoader<
   TParams extends Record<string, any> = Record<string, any>,
   const TShared extends Multistep = never,
 >(
-  load: LoadManyLoader<TLookup, TItem, TData, TParams, TShared>,
-): LoadManyLoader<TLookup, TItem, TData, TParams, TShared> {
+  load: LoadManyLoader<TSpec, TItem, TData, TParams, TShared>,
+): LoadManyLoader<TSpec, TItem, TData, TParams, TShared> {
   return load;
 }
 
@@ -203,6 +203,15 @@ export class LoadManyStep<
       value instanceof Step ? value : constant(value),
     );
   }
+  setParams<
+    TParams extends {
+      [key in keyof TParams]?: TParams[key] | Step<Maybe<TParams[key]>>;
+    },
+  >(params: TParams): void {
+    for (const [key, val] of Object.entries(params)) {
+      this.setParam(key, val as any);
+    }
+  }
   addAttributes(attributes: Set<keyof TItem>): void {
     for (const attribute of attributes) {
       this.attributes.add(attribute);
diff --git a/grafast/grafast/src/steps/loadOne.ts b/grafast/grafast/src/steps/loadOne.ts
index a0db61bb8d..8d1afde987 100644
--- a/grafast/grafast/src/steps/loadOne.ts
+++ b/grafast/grafast/src/steps/loadOne.ts
@@ -162,6 +162,15 @@ export class LoadOneStep<
       value instanceof Step ? value : constant(value),
     );
   }
+  setParams<
+    TParams extends {
+      [key in keyof TParams]?: TParams[key] | Step<TParams[key]>;
+    },
+  >(params: TParams): void {
+    for (const [key, val] of Object.entries(params)) {
+      this.setParam(key, val as any);
+    }
+  }
   addAttributes(attributes: Set<keyof TItem>): void {
     for (const attribute of attributes) {
       this.attributes.add(attribute);
diff --git a/grafast/grafast/src/steps/loadedRecord.ts b/grafast/grafast/src/steps/loadedRecord.ts
index 533c7a134a..b0763274fc 100644
--- a/grafast/grafast/src/steps/loadedRecord.ts
+++ b/grafast/grafast/src/steps/loadedRecord.ts
@@ -74,6 +74,15 @@ export class LoadedRecordStep<
       value instanceof Step ? value : constant(value),
     );
   }
+  setParams<
+    TParams extends {
+      [key in keyof TParams]?: TParams[key] | Step<TParams[key]>;
+    },
+  >(params: TParams): void {
+    for (const [key, val] of Object.entries(params)) {
+      this.setParam(key, val as any);
+    }
+  }
   deduplicate(peers: LoadedRecordStep<any, any>[]) {
     return peers.filter(
       (p) =>
diff --git a/graphile-build/graphile-build/src/makeNewBuild.ts b/graphile-build/graphile-build/src/makeNewBuild.ts
index d5f0e028a2..bd166baff4 100644
--- a/graphile-build/graphile-build/src/makeNewBuild.ts
+++ b/graphile-build/graphile-build/src/makeNewBuild.ts
@@ -96,7 +96,7 @@ export default function makeNewBuild(
       );
     }
     const newTypeSource =
-      origin || `'addType' call during hook '${build.status.currentHookName}'`;
+      origin || `'register' call during hook '${build.status.currentHookName}'`;
     if (allTypesSources[typeName]) {
       const oldTypeSource = allTypesSources[typeName];
       const firstEntityDetails = !oldTypeSource