You machine/cut down the diff case and add a 5x10x3 bearing to the outside of the diff inside the bearing that is already there. It takes away all the out drive slop. I was going to sell the diff's pre-cut with the bearings but am still testing with exactly how much to leave on the diff. So far the only issue I have had was one side of the diff leaking but it was a very old/worn diff case I was using to test with. Waiting on new parts to arrive with seals to test a final product.

Shaun (Coyote) does have some for sale currently if you do not want to attempt this yourself. I believe they are $36 a pair from him.