Who could stay away a couple of days with a fun bike project waiting! I got a little further tonight. Difficult using the ready-made stay, as the internal diameter of the tube made it hard to get a sleeve to work in both upper and lower pieces, so I started over with a different bit of stay closer in tube thickness. Still considering cleaning it up at the dropout. Not super happy with the look at the moment, and I think I can do better. Very happy with the fit at the top end though.