Ever gotten money back from a machine shop?

the problem is that all the machine shops are disappearing and the older dudes that had the knowledge on the older stuff are disappearing too. It's a tight margin when you have to compete with turn-key crate engines that are tested before they get shipped. I believe the younger fellow who took over the shop may have a big learning curve ahead of him. If you are 'swamped' you need to convey that to the customer and come up with a plan. Like the saying says, poor planing on your part does not constitute an emergency on mine. I think in exchange for the screw-up, maybe he could give you a break on some future work that you may have done. I think I would give him some time though to see how everything plays out in terms of a reputation. He's probably a decent machinist in general but maybe a not so good business person yet. I know the local shop here in town gets swamped with circle track engines during certain times of the year but the guy will tell you that ahead of time. Good luck.