How is everyone measuring piston cylinder clearance? I have a micrometer that can measure in .0001 increments and thats fine. But only a verner caliper for ID but don't feel this will offer accurate measurement. Does anyone use feeler gages as "go" , "no go" type gages. Also where do you get feeler gages in .0001 increments. Just received cylinders back after plating and I asked for .004 clearance. I want to verify and make sure its .004 and not more.