if you are worried about weight dist. then just add weights in the front. What you could do is get old tire weights (the ones that they put on wheels to adjust them) and melt them down, make a mold and make mini weights. It's very cheap. then put a whole in the chassis up front and put a screw up through it. And put the weights on with a nut on the top. Just keep adding weight til you don't see any increase in functionality. This should work.