Anybody has plans for a good trail groomer that you can haul at the back of a sled? It would be used for grooming a landing strip for small bush plane and maybe a DC-3 so the surface has to be as smooth as possible.

This might help you out:
http://www.frontiernet.net/%7Edooda/new_grm.htm
or
http://www.angelfire.com/biz/easypull/