Flintlocks were "state of the art" for some two hundred years and of course people were working to improve them the whole time. The late English locks, just before being replaced by percussion were naturally the most perfected designs. The Durs Egg, while not a really late lock, does incorporate some refinements such as the mainspring linked to the tumbler, a roller frizzen, and a semi-waterproof pan. If you think it may be too large then consider the "John Bailes" which is almost the same lock in a slightly smaller size.
Jim Chambers Deluxe Siler is the same plate as the standard L&R Siler but with a slightly taller cock and with more attention paid to fitting up and tuning the internals and balancing the spring pressures for fast, snappy action. It is just what it claims to be, a deluxe version of the old standby Siler for a few bucks more.
