I recently rebuilt my top end. I was cheap and bought a chineese cylnder and piston kit. It's all together and runs really nice but after reading the forums I dont feel good about leaving crap parts in. I still have my old cylnder and want to bore it out. If I bring it to the dealer they will bore it but I have to buy the piston from them and will be over charged. I want to buy the piston myself and bring it to them to machine the cylnder. Should I start with . 50 over??