Rope Tow Rebuild

My son LOVES to ski, but by the time he gets out of school, we wouldn't have enough time to get to the mountain by the time the lifts close. So I built a rope tow in our back yard so we can rip laps until it gets too dark. In this video, I rebuild the drive system on it, which involved casting and turning a new urethane driver roller.
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I promise I'll still mostly make stuff out of rusty junk and not just buy shiny things with your money.