I've used a Michell R record clamp on an EMT 948 with great results. to my knowledge the 948 and 950 spindle and platter are identical.There are two different styles of this Michell clamp. The one I have is, I believe, the one desgned for a long spindle and it fit the 948 perfectly. Do a search on Agon or Ebay and I'm sure you can find these for sale.