Levers should be able to be used to pick up the "loops".
A cryptic note I came across in one of my LEGO sets reminded me that
levers can save having to use another motor on a robot challenge.
This is a prototype that works.
It works on the rover, too.
This page was from
Davis Creek Mars Samples
February 27, 2004
Davis Creek Red Rover
saw Dr. Majid Jaraiedi, the director of NASA West Virginia Space
through the camera of the Red Rover
at Marshall University.