Hey Dan!
Yea I've not been back at bikeforums.net for a while (too busy working for Motorola and racking up 15,000 miles this year... Well I still have a bout 400 miles to do
Anyway I think some of the suggestions above are good... All you realy need is a clamp that will hold the top of the rack steady as the load is all on the posts connected to the eyelets at the rear wheels. Whatever you use to wrap around the seat-stay area you just want to make sure the metal part is coated with rubber or tape so as not to scratch the paint off the frame... As long as the clamping is secure then the rack will be steady ...
Hope you can make the Olrando 200k this coming weekend!
Oh and yea I initially bought the rack for the front but then I realized when I got it that the posts are on swivels so I can swivle it to mount on the rear... Heck depending, I may get one for the front too probably if nothing else to hold quick-to-get-to food/camera and nice-mounting for the front lights...