So after a couple months of ownership I'm really getting into doing maintenance on my 2000 S3. I just went to do a coolant flush and one of the Allen bolts that holds the front plastic trim to the gas tank just won't come out. Spins and spins but doesn't get looser. I can't get the tank off because there are things to loosen under the plastic in order to do so. Is my only option drilling out the bolt? And who is best to the work? I have only seen it done and have no experience myself. I'm thinking a custom shop would be better than my dealer. My local dealer is OK. They don't really blow me away with confidence. What can I do?