I'm a builder of some of these "mid range" guns. When I get a custom order, I will ALWAYS tell the prospective customer exactly what to expect, from the lock, to the barrel, to the stock finish. I try to build guns that actually look and feel like 18th century guns. Sometimes the customer needs to be prepared to see scraper marks!
I have seen the old saw "the customer is always right"...well, that ain't so. Sometimes folks don't really know what they want, and sometimes they want something "wrong": "I'm a F&I War reenactor, and I want a rifle just like ________ (insert your favorite original 1770-1780 rifle here). Generally, however, in this field of interest, most folks are educated enough to know basically what is correct and what is not. And then, of course, some customers simply want to be butt heads (I have never had this happen to me, fortunately) no matter what.
However, the only thing I see (and ALL I can see is what has been previously posted...) that Fatman did wrong is that he wanted a per-cussed gun!!! :youcrazy: Yes, the converted lock would be correct, and Cawood was right to say it was correct, HOWEVER, he should have described this in detail before any work was done or any money changed hands. I was not there so cannot say if this did or did not happen. When confronted with the converted lock, he should have said something like "oh, I'm sorry, maybe I didn't tell you about this, this is the only style of percussion lock we do". Maybe he did or didn't, I don't know. If he didn't make a percussion lock that was "unconverted" he shouldn't tell the customer that he would take care of it and replace the lock. If the lock wouldn't be any different, why replace it?
Even though the customer is not "always right" the customer needs to be respected, and he MUST be apprised of every detail BEFORE a deal is made. If the gunmaker makes a mistake or otherwise screws something up, he should happily fix it. If the customer wants to be a pain, there is still no reason for the maker to get belligerent...it only gives the irritating customer ammunition against him. If the customer is not happy for whatever reason, it pays to simply buy the gun back. It keeps the buyer from posting horror stories about you on websites, and even if he doesn't like you, he is left no worse off than he was before, AND you can take the gun built for him and sell it to someone else who understands just what he is getting, so the maker is not really out any time or money. Everyone stays reasonably happy this way.