Since we are talking tandems, maybe someone out there (local, I hope), can use either of these. I think the 3Rensho falls within or close to the CR timeline, if not KOF guidelines.
3Rensho - 57cm x 57cm (fillet brazed, TA, shown at San Diego Show, one of maybe 3 or so in the USA). $2500 OBO.
Santana - 55cm x 52cm (tig welded, Campy Ergo 8spd). $1000 OBO.
Will throw in Tandem Topper mount to first one to go. Ask for details and pics.
Los Angeles CA