Scooby is my go-to. Grappling hooks are used for when vehicle rolls out of control. Works brilliantly for immediate anchoring. Carries around 11,000ec on board, with another 20,000 in capacitor? Not that I ever run out of charge, but he recharges quite quickly. Obviously can drive upside down without trouble. Landing gear on the sides rotate and flip vehicle onto tracks. Storage containers on hinges, so they are accessible regardless of vehicle orientation. Practically indestructible. Launched off a few different "mountains" on Mun, let him roll for 400-500 meters. Just walked away, and let it tumble for a few minutes. No damage. Probably doesn't hurt that there's a total of 30-40 strut bars on it....Maxes out on Mun at around 25 m/s? I think. 15m/s on a 45 degree uphill. Need to test on other surfaces. There's a smaller version named Scrappy, of course. Working on a larger version.