RE: a must for madforce
With metal disc brakes on ANY vehicle, they will be sensitive, and even noisy until they are broken in a bit. I always smooth my edges on any 8th scale buggy, or any vehicle with metal discs. Take some crocus paper, and start polishing the discs. Especially any vented areas. Make sure when you re-assemble them that the discs are lined up. You dont want it assembled with too much drag brag, but you dont want them jingling around like a bell either. For a better braking feel use a spring on the brake rod. It will give a nice feel to it. On top of that if you use a nice radio, learn to adjust TDB, and EPA. Hope this helps.
Matt