Ever gotten money back from a machine shop?

Aaaa, three mistakes one of which he admitted to as he gave it to him, that the bushing was all out of whack! And you want him to take the motor back to him again to do what!? Some more of that fantastic assembly work? LMAO
No s***! I'd be thinking, " I got it from here."
I'd do the same thing you're doing, go down and have a nice chat with him all calmed down. I think you're well within reason asking for the new bushing gaskets and some sealer money. And maybe a little trade time like machine worked time for the time you're out. And more so the admittance of wrongdoing.
I'm sure there's plenty of Jack wheels on Craigslist that'll "build ya a motor". This is supposed to be top dollar for top work. Not someone answering phone calls in the middle of assembly work! THREE TIMES!!! This is get it right the first time and double check it after that kind of money here.
And I can see easily where the pies sliced on opinions here. People that have had their Motors in shops and felt some of the same pains and the people who created the pain! LOL the people who own shops or work in them or have worked in them.
my opinion....