So basically you are unwilling to give them a chance t make things right at all based on past dealings. We have to respect your opinion on that. But you are assuming they will hold the engine for "ransom" to bilk you for more money. I can also understand why you want a "refund" but in this business that is pie in the sky thinking honestly. Not saying you were not treated correctly but not allowing them to fix the situation when they apparently have offered IMO is a mistake.