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.
Tripod Ball Head Mount With 360 Degree Swivel And Bubble Levels For DSLR Camera, Tripod, Monopod & More!
14 Review
1K Ball Head By Joby: Boost Your Camera'S Stability And Maneuverability
14 Review
Neewer Leveling Cameras Tripods Monopods
11 Review
ANNSM Tripod Ball Head With 360Β° Swivel And Rotation, 3/8 Inch Hot Shoe Adapter For DSLR Cameras, Camera Sliders, Stabilizers, Camera Cages, Microphones, LED Video Lights Monitors & Flashes
13 Review