HomeGripscamBLOCK Vertical Rail Kit Allowing For Vertical and Angular Movement: Same camBLOCK system, but added functionality with this new kit thanks to the camBLOCK’s modular design. The kit adds a guided counterweight along the back of the track. The weight trolly is locked onto it’s own set of guide rails allowing for vertical and angular movement. Depending on how much track you want to use, you can achieve five to twenty feet of motion control movement. See camBlock for more details.