These two rovers were a lot of fun to build. I don't build sci-fi a lot, so this was a nice change from Castle.
The little rover was especially interesting, as I used pretty much only grey for it, which limited my part selection.
The larger rover (the LG-2) has working steering, 'suspension,' and opening tailgates; while the smaller (CS-0) has a neat sample gatherer, moveable radar dish, and hinges
between each section of the vehicle.