Well, I got the new pistons and rings in, and they don't have windows in them. I just ordered by the wiseco number from a dealer. It seems my pistons have custom machined round windows (2 in each piston). I guess I'll just re-use the old ones until I can get the new ones cut, as they are probably fine. BUT I nicked the top of one while taking the cylinders off. There is a tiny 1mm(?) wide gash where the sharp bottom of the sleeve hit. Do I need to file that down? Will the tiny piece of metal that protrudes out of the gash "glow" and cause the motor to diesel?