Gotspeed2000, As for you not being the professional. I do my best find time fallow these forums / chat at the tracks (get alot of emails and text messages too) listening to you racers comments as to how your resized engines perform. The ease of rebreakin and how/when engine makes power (as compared to it new) has everything to do with the new designed fit I put into these piston + sleeve sets. Its all about the feedback I get from you guys racing. Professionally I am a Tool+Die maker better with alloy reconstruction than as I a racer now. As for the resized tightness most often requested my repeat customer base, is "light-medium". Everyones piston + sleeve set is return shipped with a great fit and improved surface finish condition.
RayAracing