Hi Mike...this group is fun eh....all the different ideas and a great opportunity for practising lateral thinking. I never would have thought of that one. But you see the paras doing it with their handcycles, so why not!. I imagine you would get pretty good abdominals outa that! But it is simple to try and I'll give it a go...anyone else ever seen such an arrangement? I think it would not work well on ascending hills but it certainly would solve even the worst PSI problem. Happy slithering Howard