[Wayne TenBrink]

Aother option for 6WD (or 8) is to elevate all center wheels so that they only come into play when crossing the bump. By having them elevated, you don't get the traction benefit on flat ground, but you can eliminate the "high centering" while still reducing the angle that the chassis must reach while crossing the bump - you go over smoother and are less likely to tip because you don't rock forward so much when coming off the top of the bump.