Tidd Tech Roller The Tidd Tech Roller originally came with a white plastic drum. It worked fine, but after a few years the plastic dried out and became brittle (from sitting in the sun in the summer) and eventually it cracked. I removed the plastic and replaced it with a 24" double wall plastic culvert. The culvert works great, but the deep grooves in the culvert leave a lot of loose snow on the trail. After using the roller the trail had to be groomed again to make it ski-able. I added the comb and track setter on the back of the roller so the trail is now ski-able after using just the roller. It doesn't leave a "professional" finish on the trail, but it is ski-able for a few days and reduces the number of grooming passes needed after a big snow fall. The levers and steel rods with springs lift the comb and track setter up off the snow and apply down-force to pack the trail tight and set tracks.
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