Fishing Muskegon lake last Friday I noticed this guy on the lake pulling his flip over with his quad and something looked funny. I stopped and talked to him and he had a very neat idea to save the bottom of the tub. He had one of those kids roll up plastic sled/tobaggons installed underneath the tub. Screwed it in the front and back lip. Said he's been using them for a couple of years and when one wears out he just gets another and he said he's never had one come loose...... and they're fairly cheap.....