For really nice print, I print at 0.12mm and use Cura slicer. For rough draft or faster prints, I used 0.2mm
The disc on the left fits my first gen Rustler body posts and the one on the right fits the body posts of the e-maxx.
After letting a young man drive the emaxx and having him wreck it and pull the body pins through the body on both rear posts I decided I needed to disperse the point of impact that the pins have on the body. I've personally also ordered foam discs to go between the body and the disc. If using the foam, you will have to lower the body on the posts to give more clearance for the foam and disc. If you just use the discs, you probably won't have to move anything.