Mr. Cunningham is a very good smith but he simply cannot keep up with the demand and besides, there are plenty of good revolversmiths around besides him. I also feel he is a little overpriced for some work. One thing to remember is that the number of smiths who are truly qualified to work on Colt revolvers are becoming rarer every day. Most of them are either retired in an old folks home or are dead. If you must have a tweaked out Colt it's going to cost you and you'll probably get to wait a long time for it.
A Colt revolver is an entirely different machine than a S&W.