diff --git a/NDTensors/Project.toml b/NDTensors/Project.toml
index 5b31b000dd..ad82ee5355 100644
--- a/NDTensors/Project.toml
+++ b/NDTensors/Project.toml
@@ -1,7 +1,7 @@
 name = "NDTensors"
 uuid = "23ae76d9-e61a-49c4-8f12-3f1a16adf9cf"
 authors = ["Matthew Fishman <mfishman@flatironinstitute.org>"]
-version = "0.4.0"
+version = "0.4.1"
 
 [deps]
 Accessors = "7d9f7c33-5ae7-4f3b-8dc6-eff91059b697"
@@ -45,13 +45,13 @@ TBLIS = "48530278-0828-4a49-9772-0f3830dfa1e9"
 cuTENSOR = "011b41b2-24ef-40a8-b3eb-fa098493e9e1"
 
 [extensions]
-NDTensorsAMDGPUExt = ["AMDGPU", "GPUArraysCore"]
-NDTensorsCUDAExt = ["CUDA", "GPUArraysCore"]
+NDTensorsAMDGPUExt = ["AMDGPU", "GPUArraysCore", "TypeParameterAccessors"]
+NDTensorsCUDAExt = ["CUDA", "GPUArraysCore", "TypeParameterAccessors"]
 NDTensorsGPUArraysCoreExt = "GPUArraysCore"
 NDTensorsHDF5Ext = "HDF5"
 NDTensorsJLArraysExt = ["GPUArraysCore", "JLArrays"]
 NDTensorsMappedArraysExt = ["MappedArrays"]
-NDTensorsMetalExt = ["GPUArraysCore", "Metal"]
+NDTensorsMetalExt = ["GPUArraysCore", "Metal", "TypeParameterAccessors"]
 NDTensorsOctavianExt = "Octavian"
 NDTensorsTBLISExt = "TBLIS"
 NDTensorscuTENSORExt = "cuTENSOR"
@@ -90,7 +90,7 @@ StridedViews = "0.2.2, 0.3"
 TBLIS = "0.2"
 TimerOutputs = "0.5.5"
 TupleTools = "1.2.0"
-TypeParameterAccessors = "0.2"
+TypeParameterAccessors = "0.3"
 VectorInterface = "0.4.2, 0.5"
 cuTENSOR = "2"
 julia = "1.10"
diff --git a/NDTensors/ext/NDTensorsAMDGPUExt/set_types.jl b/NDTensors/ext/NDTensorsAMDGPUExt/set_types.jl
index 759b140926..b6ec21085c 100644
--- a/NDTensors/ext/NDTensorsAMDGPUExt/set_types.jl
+++ b/NDTensors/ext/NDTensorsAMDGPUExt/set_types.jl
@@ -1,11 +1,5 @@
-# TypeParameterAccessors definitions
-using NDTensors.TypeParameterAccessors:
-  TypeParameterAccessors, Position, default_type_parameters
+using AMDGPU: ROCArray
 using NDTensors.GPUArraysCoreExtensions: storagemode
-using AMDGPU: AMDGPU, ROCArray
-
-function TypeParameterAccessors.default_type_parameters(::Type{<:ROCArray})
-  return (default_type_parameters(AbstractArray)..., AMDGPU.Mem.HIPBuffer)
-end
+using TypeParameterAccessors: TypeParameterAccessors, Position
 
 TypeParameterAccessors.position(::Type{<:ROCArray}, ::typeof(storagemode)) = Position(3)
diff --git a/NDTensors/ext/NDTensorsCUDAExt/set_types.jl b/NDTensors/ext/NDTensorsCUDAExt/set_types.jl
index bab1149890..c9814666b5 100644
--- a/NDTensors/ext/NDTensorsCUDAExt/set_types.jl
+++ b/NDTensors/ext/NDTensorsCUDAExt/set_types.jl
@@ -1,13 +1,7 @@
-# TypeParameterAccessors definitions
-using CUDA: CUDA, CuArray
-using NDTensors.TypeParameterAccessors:
-  TypeParameterAccessors, Position, default_type_parameters
+using CUDA: CuArray
 using NDTensors.GPUArraysCoreExtensions: storagemode
+using TypeParameterAccessors: TypeParameterAccessors, Position
 
 function TypeParameterAccessors.position(::Type{<:CuArray}, ::typeof(storagemode))
   return Position(3)
 end
-
-function TypeParameterAccessors.default_type_parameters(::Type{<:CuArray})
-  return (default_type_parameters(AbstractArray)..., CUDA.Mem.DeviceBuffer)
-end
diff --git a/NDTensors/ext/NDTensorsMetalExt/set_types.jl b/NDTensors/ext/NDTensorsMetalExt/set_types.jl
index 761fa089d4..a5a548603c 100644
--- a/NDTensors/ext/NDTensorsMetalExt/set_types.jl
+++ b/NDTensors/ext/NDTensorsMetalExt/set_types.jl
@@ -1,13 +1,7 @@
-using Metal: Metal, MtlArray
-# `TypeParameterAccessors.jl` definitions.
-
-using NDTensors.TypeParameterAccessors: TypeParameterAccessors, Position
+using Metal: MtlArray
 using NDTensors.GPUArraysCoreExtensions: storagemode
+using TypeParameterAccessors: TypeParameterAccessors, Position
 
 function TypeParameterAccessors.position(::Type{<:MtlArray}, ::typeof(storagemode))
   return Position(3)
 end
-
-function TypeParameterAccessors.default_type_parameters(::Type{<:MtlArray})
-  return (Float32, 1, Metal.DefaultStorageMode)
-end