good choice!
i've been running the D4 (original but with WCE upgrades) for several months now and it has been great.
The diff bolts have been fine on mine, just make sure you don't overtighten them as this seems to be the cause of problems.
Only recomendation i would make is to pin the slipper clutch up with a second pin so that the front and rear don't work independantly. I found the handling a little unpredictable with the original setting, especially on slippery tracks. If you pin it the car drives far more consistantly.
|