Well from viewing the pages on this site regarding replica and Lee Speed builds/rebuilds I feel right at home.
I am starting out with a 1909 BSA manufactured MkIII. Currently the barrel and receiver are soaking in penetrant with hopes of removing the barrel so that I can send it off to http://www.35caliber.com/ to get it rebored to .375. The goal is to turn it into a 375 FNE.
Nothing at all wrong with the 303 British as I hunt with a few sporterized Lee Enfields still in 303 British. No flies on that cartridge.
I am continuing to practice my metal work and checkering and brother do I need to keep practicing