i highly recommend Mike Zachs in Providence. His motto is "we fix the impossible" and he has for me, at a reasonable price. A sticky shutter is not a big deal, and usually involves opening it up, cleaning the old lubricant away, and replacing it with new lubricant. I have fixed some of my own sticky shuttrs by squirting lighter fluid into the shutter--it works more often than not. I have also had great luck with "working the shutter" to loosen up the old lubricant. I do this by cocking and releasing the shutter from fast to slow speeds--it loosens up the old lubricant and reallly ticks off my wife. I have an old Wollensack stereo camera that needs this treatment before I take it out shooting.