Just looked through the pictures of the S2, and I like all the changes except the motor mount. Seems to be the way most of the manufacturers are going with the motor mount, but I like the idea of having my motor mounted to more surface area to avoid the possibility of gear mesh issues during a crash. I've seen guys with the X-ray T4 have to replace the spur gear every time they tapped the wall. Just my opinion based on my observations, it's worked out well for everybody else.