I have a really wonderful Cognisys Slider controlled by a Stackshot 3D. The Stackshot 3D is a very easy system to set up, program and run. It has one tiny little defect, one that is common in pretty much all sliders. They are bulky, take a while to set up, and typically need two tripods to support them. You really can’t have all that in your backpack ready for that “ah-ha” moment.