I've finally completed my retro disability bike now it's back from the paint shop. The frame is a classic 531db, portacatena dropouts, S4 lugs about 1980. I had to go with flat bars and all left hand control and that really dictated the retro-modern build. It's Dura-Ace 7900 gears, on ten speed thumbies and a Paul duplex lever that pulls two cables simultaneously. Wheels are Ambrosio on 7900, 3TTT stem, nitto bars and Brick Lane saddle.