I used a pair of skis attached to a 2x4 vertically, screwed in from the bottom of the skis to the 2 by 4, with the screw set in... works like a charm.. on top of that i laid 3 2x4s across-ed and plywood over that... can pull by hand, (its not a full shaq, i put my HUB style portable on top of that... for easy moving hole hopping