I have personally used Mike Orlen's services on five different occasions, twice for choke alterations, once for chamber lengthening and twice for stock bending. Every interaction has been satisfactory - with a very fast turnaround time. Every gun I have shipped to him has been returned by the eighth day after sending, it's a 4 day ride out there via UPS and a 3 day ride back; which of course, tells me he has done the work and shipped the gun out within 24 hours of receipt.
There are several very good gunsmiths scattered around the country that many of us entrust our precious doubles with that do quality work, but it's hard to find a gunsmith doing quality work with a quicker turnaround.
Here's a link to his services offered, price list and feedback in a thread he started on SGW:
http://www.shotgunworld.com/bbs/view...p?f=12&t=36237