That reminds me that the shop I worked for in the 1980s sold a couple of Alan aluminum framesets (I think they were Alan frames, anyway; maybe Vitus, though) built for 24" tubulars. The chainstays were designed to be short enough to keep the rear wheel tucked in close to the seat tube, and the top tube was cut down, too, so the wheelbase was incredibly short. As you might imagine, the handling took some getting used to, from what the purchasers told us.