How thick is the fiber washer that goes between the axles?
As I recall, the NOS one I just installed was .100"
I machined mine from aluminum bronze was in the .09" range if I remember correctly
Just measured a new one. I got .104". I suspect they may vary by a few thousandths.
How thick it needs to be depends on the wear. You need to assemble the carrier and axles without the washer and spider gears and see how much movement in and out the axles have. When assembled you don't want the axles too tight to turn in the carrier nor too much end play.