Shimming Planetary Gear Cogs

I've read Monroe's book and although it mentions shimming the planetary gear set with a .010" shim under the thrust washer it doesn't specifically mention shimming the individual gears in the set (3, 4, or 5).

Mine have definite play up and down on the shaft, but side to side is tight. It stands to reason that if the up down play in the shaft remains the sun gear and planetary set will have some play as the planetary gears are thrust up and down on their respective pivot pins.

Is there a max or min on the play? Do they make shims to correct this? Anyone shim the planetary gears? Look to be held in with a roll pin. Thanks.