my examples in 559 were pretty close to what Arup used in 571
Yeah, but he was obviously not making any attempt to be aero. Also, old-school midget P3s take 650C, so if that's the best TT/Tri frame you can fit on, no amount of 650B aero development is going to help.
shirley, but my examples in 559 were pretty close to what Arup used in 571