The good thing is if you have to ship the barrels off to get the work done, you don't have to pay those excess prices for shipping. You can ship at the least costly rate.
Carlsons are the pros, they do it everyday. I haven't had them work on any of my guns, but I know people that have, and they were very happy with the work. If I remember correctly the $185 price includes 3 tubes with a wrench. Extended tubes are are a little more.