No problem.
One of the problems lies in the definition of what perhaps is a Hawken or whatever. They changed through time, and one that you got for instance in 1830 might not be just like the one I got in 1845. So, a careful study of history and architecture of the different names of guns is important, as well as picking a time period for that named gun. My rifle represents what would have been perhaps an 1838 average as far as I know. I am sure that it can be nit picked also, but that is what the guys at the Hawken shop in St. Louis told me the day I bought those blueprints. My resulting rifle is as close to those blueprints as I could get it.........then it comes down to, did the guy that drew them have good info in 1978 to work from?
The Hawken is one of the most complicated to get correct. Do you have your lock panels at the correct angle?,,,Hmmm, well what year are you talking,,,some were parallel and some were angled..........Don has the best reputation for correct at this time. I have a set of his blueprints and we are talking about parts. Wow, they are not cheap any more. Parts alone run almost $1000.
I guess you have to decide whether you want to drive a Blazer, a Yukon, or an Escalade. They all look the same but you pay more for the name.