Box rolling on an inclined conveyor belt.
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Previously:
https://www.homemadetools.net/forum/...387#post113481
https://www.homemadetools.net/forum/...993#post133930
https://www.homemadetools.net/forum/...298#post157961
https://www.homemadetools.net/forum/...657#post147667
https://www.homemadetools.net/forum/...020#post153188