so, I am having problems with my cads lately. i am doing a traybot, and most of the lifts that I try are not working. i’ve decided to try for a vertical lift. do you know of anything other than a dr4b, dr6b, cascade lift, and danny lift? currently i am thinking scissor would work. I need something that you don’t have to attach pivots on the tray of my robot. also, if you know of some, could you list some decent scissor lift designs here?