Mike; I've gotten your messages but am out of town, you neglected to leave me a number to call you at so that's the only reason I have not. The clips shipped with the kit are the only clips I can offer you and the only ones ever needed over the years. The smallest is .170 and if you require less than that I'm not sure why the shop is not simply using the stock one? Yes they can be ground and yes it does require a mag base. The are carnorized and should not have more than a couple of thou taken off any side. This means a .170 could, in theory, be down to .166. Not sure but I think the stock ones are in the .160-.165 range. There is no requirement to use the ones supplied they are only for your use if needed.
As for the assembly of the rear hats and rotors on a kit, I'd not be sure why any shop has a problem understanding how they bolt together. One of every kit is always sent in mock up and labeled "mock up" or "example" for this reason. "bolts not tight" making it a clear and easy example of what goes where. The rear kits are more involved yes. Not by design but by demand. If I could make it much simpler I would; blame it on the rear parking brake design here guys. Not a lot of options...
Gotta run, I'll check back later.
As for the assembly of the rear hats and rotors on a kit, I'd not be sure why any shop has a problem understanding how they bolt together. One of every kit is always sent in mock up and labeled "mock up" or "example" for this reason. "bolts not tight" making it a clear and easy example of what goes where. The rear kits are more involved yes. Not by design but by demand. If I could make it much simpler I would; blame it on the rear parking brake design here guys. Not a lot of options...
Gotta run, I'll check back later.