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http://www.pinkbike.com/video/334877/ This is the one that I built by hand. Lots of shoveling. This video is a 3-4 years old and since then the pumptrack has transformed into dirt jumps. I think the record was 6 laps, no pedaling.. On the day the video was shot, the ground was damp and rolling speeds were low, hence the difficulty of multiple...