Opinions please

A deals a deal. It ended when he agreed to give you the motor for services rendered. Any new agreement is up to you. You just got to quit being such a nice guy. In the future get prepayment of 1/2 and photodocument everything. BTW my luck the block would be cracked. It would serve him right if you sold it back to him. I bet he's got friends whispering in his ear who don't know jack about machining. And BTW think about storage charges!