I thought I would share my first stable manned mun rover. I stranded Bill and Johnbur on my first two attempts at building a rover when they flipped, so I made a three-seat rover for the third try, and sent Hadcal on the rescue mission. It worked like a charm! I can drive around at 20 m/s without risk of flipping the thing. My strategy was widening the wheel base, adding the extra pair in back, and making the CG as low as possible by putting 4 RTGs and two batteries on the underside.