I have one Sydney, and used it to build the pistol you know. It was written by Georg Lauber, I believe. You're welcome to use it if that will help you dull your files. I like the locks that Raszpla makes for their plate profile. His filing and workmanship is better than most of the original work I've seen. None of the originals I've seen are perfectly polished as we tend to do today, and file, chisel, and saw marks are evident. His locks are completely correct, as far as I can see from photos. I'd love to own one of them.