Clearance with dry vs wet clutches

I always install the pump into a vise and use air pressure to apply the clutches. I watch how much the piston moves to determine clearance. You can vary the pressure to the direct clutch so the snap ring isn't compressed; either way. But I use enough pressure to squeeze the excess fluid out of the frictions. Using a set dimension "per clutch plate" is ridiculous. And a piston being able to move ".125" is not a consideration. Too much clearance can cause a delayed forward engagement, a delayed reverse engagement, and even a 2-3 spinup.