We have begun work on designing a simple climber that pivots onto the chain, doing a sort of “robot pull up.” This eliminates the need for a linear actuator like the AndyMark climber in a box (which would be more of a hassle to assemble), but it does mean that we can only cimb on the center of the chain (the lowest point). We are planning to use two NEOs with 40:1 gearboxes to produce enough torque to lift the robot.