I'll try to get some pics.
Encouraged by my success with the ejector rod, I worked on the base pin, and got that out, too.
I ran a long punch through the loading gate and a chamber, which gave me a straight shot at the back of the oversized head of the basepin, and I was able to drive it off the frame. There is a small leaf spring set in the middle of the trough-shaped base pin, to retain the ejector rod, just as was described to me.
I was dreaming (literally, not just musing or daydreaming) about making a trigger guard, by tracing the outline on flat steel plate, then using a hacksaw, drill, files, and dremel to form it. Geez, this is getting serious . . .