Thats great thanks Marvin. I assumed a slipper would remove some of the stress from the drivetrain especially going from forward into reverse. The power on tap from the castle neu 2200kv can be quite severe and I'm expecting diffs to go at some point. I'm just trying some different threadlock now and so far so good.
Marvin have you encountered the front A-arm problem at all? I was recommended by someone that the arms can be replaced with the arms from an xray (I think, or another make) which increases the overall width too. I don't no about anyone else but the 9e appears to quite narrow when compared to other buggies?
