I'm currently running Meteor diff halves on the Cobra diff gear.
The Meteor diff has a locking grub screw on the opposite end of the
diff screw,it doesn't come undone and the diff holds it's adjustment
no matter what.
It's a slipper clutch I'm looking for really to fit the Cobra's top shaft.
I wondered about the Mad Rat 'box because it seems to have a pretty robust diff and a slipper fitted as standard.
The only drawback(as far as I can tell)is that Ansmann only do 80t spurs for it.
If you want to change the spur then you're looking at a modded RC10 B4 slipper and spurs
.
Mark