Well, I went through the pistol once more before sending to Dave, and while smoothing the beavertail just once more, I rendered it inoperable! Crud! Installed another - PROPERLY this time - and test fired today. First three rounds only made it about 1/2 way from the mag into the pipe, as a result I believe of lack of lubrication. After that, 10 mags went through without a hitch, including the first mag. So, it's done. Sent it off to Dave for grading and finishing. I'll miss it until it comes back - we have spent a LOT of time together over the past few months!
Best,
Jon