i just bought this kit and i managed to break the top piston ring. I need to get new ring but that might be hard. I know some people say that it is better to replace the piston by a Metrakit of Airsal piston. I would like to know if anyone has done this here and if it makes a big difference because ?? because it might be easier to get a metrakit piston then finding a new gilardoni piston or the ring. Or maybe if some of you know of an other piston that could be even better.