The thing is - I called around, obviosuly - and all the shops around here are hick run. All but this one said they've never done 18s - and couldn't garontee anything.
I plan on trying one place that'll do all 4 for ~$80 - but they've only done 17s before.
The place that told me $40 EACH said they just got a $8000 machine to mount and balance BIG rims like what I have - AND it has NO metal contact with the wheels or whatever is and is really good - but I don't really care other than it's just the standard mounting and balancing - ya know?
I'll keep my appt. with the for Friday - since the tires aren't in until Wed = I'll take the set to the $80- place to see if they are successful with mounting them up.
Damn local back-country folk!