okay fellers, so i bought a used canoe, and it came with the device that you can set your canoe on to roll it around. There's one long strap, which would seem to go around the canoe, but it slips right off the end, b/c the end of the canoe is pointed. The canoe doesn't have a runner down the middle, it's just flat, so the wheels spin around whichever direction they feel like rolling. I don't getit. Is there a youtube how to for this thing?