[QUOTE=wario69]Carlsen will be coming out with a set of cut upper and lower arms for the rear with the spacers for the mrx4-r available at brooklynhobbies. I don't trust myself enough to do my own cutting it myself so I'll be picking up a set. They also got the new ats tires/rims in which lowers lowers the weight 20-30 grams per set of 4. Also in is some pretty cool clutch tool sets which I'm looking in to right now.
They're pretty cheap. I don't think I can mention the price here but here's the link:
I would cut it myself but knowing me, I'll screw it up. This is for people who don't want to hassle with it. Think of it this way, you'll still have the original set of arms as backup.