internally balanced 360 crank (BIG PROBLEM) need input

exactly, even if it took me 15 times to get it right, I KNOW it was done right, and its not going to come apart.

My point is he's not trustworthy in regard to his abilities. I've been in and out of machine shops since I was 16 and i'm 42. I've seen some scary stuff that held together and some that didn't. But I've never seen weight stuck in a tube and tack welded to a counterweight. NEVER. If he got the crank back from the balancer in that shape he should have sent it back once he stopped laughing. He didn't. And because he didn't I'd be frightened to the point that I'd rather not have a well-meaning but ignorant guy trying again. I have friends that own shops local to me. I drive an hour away to go to a guy I know is capable and my friends I stay friends.

All true which is why I said to take it apart and check everything when you get it back. To not get anything from him would be a mistake in my opinion. He'll get some new parts out of the deal and maybe some cash too, then he can proceed to make it right if it is not when he gets it back. Even $10 is better than $0.