It would be interesting to see a good book about all of contributions these various people Robert is always talking about and their effect/influence on American gunmaking history. It was probably just good fortune that we heard anything at all about Dan Lefever. At least his designs were put into production and his name became recognizable to the shooting public. It seems to me that Lefever and Flues shared the same type of personality.....cranky and hard to get along with, but their genuis was noted by all who chose to work with them.
All the best