I'm a 4wding nut so I pick up on these things. I don't know if you have noticed but the trailing arms in the hopper crawler's suspension are at quite an angle, even at ride hight. this means as you start to climb something steep the suspension wants to droop and tuck forward, thus making the center of gravity higher and shortening the wheelbase, and this has the frustrating effect of flopping over backward or unweighting the front wheels on very steep rock steps. this does not happen in the D series mainly because the links stay more horizontal when tackling steep terrain(but also because of a slightly longer wheelbase). I do realize this a very minor issue but it could be fixed by moving the links above the axle instead of below. I don't know if this would be easy to mod or even be in an official update but it would make the hopper crawler significantly more capable offroad. some examples: see how the hopper gets up and goes into full extension when on a steep angle and the D series stays relatively flat.
