S17 - Yet another R2-D2 derived from the original model found in the DDK.
This features both the Scout and the Microscout, connected each other with
an optic fiber.
S19 - A robotic version of the walker described in the 8891 Idea book,
modified to give the robot the possibility to change
direction and avoid obstacles. This happens thru' an additional leg that
features a motorized wheel mounted orthogonally to the direction of motion.
