put 1/8 think nitro fuel tubing bits in the diff output cups. Helps to keep the dogbones fully in the wheel's cup. When turning, they can pop out...or get bound and thus snap.

another help is to turn up the punch control on the ESC. Can be done manually, but is much easier if you buy the ezrun program card. Throttle control on the driver's part helps, but the ESC's punch control and brake settings can help alot.

Consider shock setting and camber settings. The lessor the angle on the driveshafts the less stress on them.

Ive meant to 100 times to take a dogbone to the hobby shop and search for a match from another brand but always forget to.

I tried the CVDs once and they bent. While the CVD part works well...the shaft is no thicker or stronger than the dogbone. So its cheaper IMO to go with dogbones.

These models do not have a slipper clutch. Its probly the single worst aspect. Most other brushless models have them, and they take up the strain when we land with the throttle on, or hit the throttle too fast. But with the EPX pro models its upto ESC settings and driver control to do that job. The stock ESC settings work well for the stock nimh pack. The upped power from a 2s lipo pack means the brake and punch control settings are now off of what they really should be.