It needs to be up for reversing? Ok, if you say so. The ones we had in the army didn't need to do that. You would just set the height (at both ends) with threaded spindles and off you go. It wasn't meant to shave down all the way to the tarmac anyway, just to clear so much that cars don't get stuck in the snow. An inch of snow left is not a problem, unless its really steep.