The lock I chose for this project is a R.E.Davis "Twigg" lock. Research shows that Welcome and others here at that time used mainly imported English locks on their guns. When the lock arrived, I was quite impressed with it. It felt solid and seemed to be of the same quality as a Chambers lock. I have since learned from a master builder that these are very problematic. I let Roy know my concern about this lock right away before the build started incase we needed to go with another lock. I absolutely do not want any problems with this lock. This rifle must be 100% reliable. Roy took some time and worked on the lock, tweaked it. The end result in the course of two days, the lock lite the pan of powder 50 straight times using one of Rich Pierce's flints, without doing a thing to the flint. A Fuller flint was then tried and it worked as well. Roy proclaimed it as good as any Chambers lock right now and thats good enough for me!