David,
I can highly recommend Ed Urbanowski at Urban Aviation Services.
Ed works on my plane and I'm very pleased with the work. Urban Aviation is located at Sterlng Airport (3B3) and is about ten minutes from KFIT. The telephone number is 508-344-8930. Fitchburg is close enough that Ed could drive there in 20 minutes.
Just be aware, the president is coming to our area on Wednesday and there WILL be a TFR that will cover both airports.
