727 Build for Mid-10s

I finally got a preliminary end play measure. I've got .063" of input shaft end play with a .063" shim between drums, .085" shim behind the pump, and .065" copper washer between input/output shafts.

What's the best way to get my end play down to closer to .020"? If I go with a thick .102" washer behind the pump, that puts me at .046" Is that close enough, or should I use a thicker washer between drums as well?