I've not used Mr. Chaber, but Mr. Gallifent has done several repairs for me on English and European guns and inspected a number of others, some of which I sent back on his recommendation. He's a bit temperamental at times, but a superb craftsman and he seems to be willing to take the time to teach you how to look at what you're buying if you're willing to take the time to learn. I heartily recommend him.