Below is my RC8 that I modified to run dual trays. The motor mount is Elite RC and the center diff mount is RC Product Designs. Can run without battery swap for 25+ minutes using two 4s 5000mah batteries. Spanks the crap out of the Nitros. The only thing that I will say is that electric systems are not durable enough to run 20 min races at full race pace for any extended period of time. I plan on running it electric class only and run my Nitro with the Nitro classes.
It was awesome not having to rely on a pitman.