3060 Shaft End Play?

[Mike W]

I have a 3060 that came to me disassembled and in need of rust cleanup. That is done and it is reassembled but seems to be missing a ~3mm length shaft shim. There was a 8mm wave washer present that I installed ahead of the rear bearing but can still push the shaft 3mm toward the front of the motor from where it happily resides in the mag field. ~4mm of shaft protrudes from the rear bearing inner race.

I'm curious where exactly the shaft should be centered and is it centered with 2 spacers front and rear or with only one? Just need the correct info to order the correct length bearing shims, and the correct end play against the wave washer to order a shim set.

Thanks!