I found them a bit pricey but worth it. I bought 3 of these to fit on a Ravelli tripod cart. We ran them on 1" (1.5" OD) 40 gauge PVC pipe. We were able to mount a professional Manfrotto tripod with a 32lb camera on the track and did some of the smoothest tracking shots I've ever seen. . At first the film crew laughed at my DYI track system, but after filming they admired it.
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