Bro, you got your engine rebuilt from a friend. So is it like a mechanic who is also a friend or a friend who is also a mechanic. Secondly, in the 45 years that I have spent so far on Mother Earth, I have learnt never to do any business with a relation, friend etc. Not everyone is a cheat but sometimes it is more a case of competence of the other side. You cannot demand anything without spoiling that particular relationship and at the end of it, is it really worth it? If you have been Blessed with the giving hand, simply pay in the top bracket and ensure you get top service....