just been watching video of your ice flyer,where pilot is seated infront of sail, remember reading up on this from and old site (John lord diy buggies ) no longer on net where he suggested that there was less air flow disturbance from the pilot if seated in front of sail, Did speed on the wheeled version match the conventional seated minis. You say that tacking was difficult (in what way)
Is there any reason why we don't see this configuration on latest yachts,class rules or something,because if they are faster then it's something to think about.
Many years ago I did fit a small sail to a kite buggy at the rear,and tried it ,but sheeting system was a problem so didn't progress with it.
Just got me thinking.again of a new project