Funny you mentioned this.......I just saw a bumper sticker that said, "Trust Me, I'm a Mechanic." Old school 70's sticker I think. With Yelp etc. it seems mechanics don't have as shady a reputation as they used to. Not all of them of course but it was easier to for them to get away with stuff back in the day.
I forget you are in Ketchum with probably limited "high end/knowledgable" BMW mechanics and I know Coeur D'Alene is kind of far for you but I have a great mechanic here I can get you in touch with if you can't find anyone closer. Make a road trip out of it. Welcome to stay over and I can take you to Spokane airport the next day (40-min) or same day, whatever, depends how well you travel. I make the airport run once a week to pick up/drop off my wife that travels as a nurse. If interested, call Colby at Inland Northwest Performance. He will be honest if he feels comfortable with the conversion, tell him you know Shane with the Golf Bavaria and what you are expecting and planning on doing. He is very honest and so far I have had nothing but top notch work done. And he specializes in BMW's. Just and idea. I aw the bidding on BaT, my 2 cents is be careful getting too aggressive and listing intensions early as it usually will just end up costing you more in the long run. Again, just my 2 cents, too late now but GLW BUY! Not sure if you know the seller but he is on here and a great guy!