OMG, I'm such an idiot! I'm currently in the process of installing my RC Monster diff drive cups onto my LST2 diffs in my e-revo. The two center cups went in just fine, not so for the wheel drive cups. When I went to install the wheel drive cups, they were sticking our wayyyyyy too far....in fact to the point that the CVDs bound. After hours of trying to figure out what was going on, I just discovered the screw pin never made in through the diff shaft. I screwed the pin through the cup, and then in passed in front of the diff shaft (therefore pushing the cup out several mm). And of course, everything works now!
Silly me!
