Mongo
That stinks at so many levels, and what's worse those dudes at the parts store won't lose any sleep over this. Very few folks own the fact that they did not do you right.
You have the right to get bent, I feel your pain. I to have had similar experiences so dude, put up a sheet of old used OSB board, paint a target on it, buy a dozen eggs........
Great what you're doing for your dad.
Strong work
Nut Case