Head tube just about done
I finished off the upper socket last night and took some better pictures today with a digital camera that has a macro mode (Nikon CoolPix 3100). I'll have to square up the lug edges and dial in a few spots where the curvature isn't quite right, but this piece is just about there.

Next I'm going to work on the lower half of the seat tube lug. In the mean time I need to give some thought to whether I want to grind out the portion of the head tube that is inside of the socket. Leaving it there would give me a little more joining area for an inside fillet, but removing it makes it easier to see when the silver has flowed through, and makes the mitering really, really easy.

I have a couple more pictures at my Flikr site