David I will send you pics of the cylinder walls and I'm not going to go back and forth with you over this. I understand the coating would wear off where the piston would slap on the cylinder. What we are seeing is coating falling off. As you stated on our phone conversation. You know of no one who has had to rebuild a motor using one of your stroker kits and can't defend that this could be a defective piston. You have always done me right with parts and pricing and in no way am I saying your parts are not up to par. I had a bad machine shop build my motor and I have learned my lesson. I wanted to make sure I didn't resell junk to another board member is all. I will rebuild using a reputable builder.