In general, I think it's best to rely on those who more or less specialize, and be willing to rely on the mail. We're lucky to have someone, Paul Ebel, relatively close. Paul is in Wisconsin but often in the Twin Cities area. He has a very good reputation for leaf shutter repair. His phone is 651-335-8759
and email is

For a complete CLA (body and lens), I'd check this guy out: