I have to agree with ARUSSEL on this one, and i'm a JE user, but have supplied Probe pistons to a couple of customers. .010 is totally acceptable for end clearance on the pins. There has to be something pretty bad wrong to push a pins past a spiral lock, such as too much piston clearance, bore out of SQ. with main bores, etc. I would assemble it and not worry about it. I've run more side clearance on blown alcohol applications with alum or nylon buttons and no problems.
JMO
Zip.