I am starting to build a Tennessee rifle in a week or so. I have a Siler lock that I was planning to use. Looking at old posts here it seems everyone says to use a rounded English lock on this type of rifle. From looking at photos of original rifles, the rounded back locks are certainly more common, but there are a few originals with locks that are pointed on back like the Silers. So I am wondering if the Siler type of lock is historically correct, but just not nearly as common, or is it just totally out of place? Is it possible that it was used on the earlier rifles? I can buy a new lock if I have to. Just would rather avoid doing that.