After 7 years of weekly visits to the thrift shop, something finally showed up. Looks to be a beat '91 Seven 21 with bonded alu tubes. It's been mangled into a single speed but I can't find any frame issues or cracks and it tracks straight. I was worried about a smaller seat post crunched into the cluster but it came out easy and the ears popped back out to reveal a normal gap. Has great weight weenie potential. It also has that weird braze-on under the down tube...pump fitting?
Looks like original front wheel and tange headset. Everything else is a bodge. I LOVE the custom millwork on the Custom swaged crank. Angle grinder perhaps? And who needs stem insertion lines. Amazing.
Price was right. The wheels seem to be fine, straight rims, tires hold air.