If I'm gonna build one, I might as well build two. Guns are all drilled, less the front cartridge stop, mocked up and awaiting riveting. I used a milling machine and indicators to align the barrel shroud to the LSP. I got them within .010" parallel then I drilled thru the RSP. I had some issues with one RSP as the back groove for the handle was milled .151", the same as the trunnion groove. This was not correct, it should have been .157" so I machined an additional .005" in the back groove and now the handle slides down nicely with some drag but not too much. I'll notify the MFGR of the RSP tomorrow. Otherwise, they are coming along nicely. I couldn't have done this without the wealth of information on this web site. Once I get my rivets, I'll be breaking in my new "Plinkers" rivet tool and a special thanks to Toolmanm203 for all your help and coaching.