ult, sizings prob not an issue, i race tandem on the road and off and i can usually fit the rear for a fairly wide range of sizes, she also races on the track so her bailing on me shouldn't be a prob. i'v also captained some local blind athletes in races and figure there's pretty good interest there as well. although, if it gets around how hard i crashed at the short track championships in london this weekend, there may be second thoughts.
11.4, i've ridden an old cinelli track tandem around our 200m and it flexed, creaked, and did all sorts of wierd things a single doesn't. but i'm hoping something more modern, stiffer, just plain old better, wont be all that bad.
anymore insight out there?