Dont say the name of the company until you give them ample time to work it out with you. If they refuse after that time, let us know so we are aware who we are risking our $$$ with. Stay patient and level headed. I dont know how tiny contaminants in fuel or oil could cause a metal ring or wrist pin to break, only wear more quickly than normal IMO. I am no engine builder though. If it were me, I would send pics of the damage to other reputable builders and ask their opinion. Surely they would take the time to at least reply. There are several guys on here that build short blocks, so hopefully they will give you solid advice and honest opinions. Good luck!