yup the ball cups are the problem .. but if your seriously going to get into racing .. go ahead and spend the I think 40 or 45 depending on where you order it from for the new version 2 rear suspension from Assc for the NTC3 .. its buttery smooth and solves a bunch of the handling quirks of the NTC3 ... it also holds toe settings a lot better ... I was forced off of a dedicated course and sent cartwheeling ... all the rear adujstments were still dead on ... slapped on a new set of tires ( it broke both rear rims during the cartwheeling just to give an idea of the force it took ) and went out for the next heat after a recarge and refuel ... but if you have a big parts stock you might want to wait a few months before geting the new rear end .. I measured and I do think the rear arms and such will work up front .. just no sway bar mounts .. check out the rc10ntc3 thread on here ... bunch of good info there for this chassis.
have fun racing
E
