>I would show my appreciation by patronizing their establishment.

I would also suggest dropping by with a small token of your appreciation,
a selection of nice brews, a gift certificate at a good local restaurant,
etc.  My wife, bless her heart, often bakes an apple pie to take to our
mechanic when he does such a favor for us.

Best wishes,

Tony

Anthony L. Mourkas
Hampden, Maine, USA
1984   Vanagon Westfalia
1986.5 Quantum Syncro Wagon
1991   Jetta Eco Diesel