Hi, I love those heat sinks on the motor. Here is a picture of my CEN truggy conversion. I have the batteries sitting on the chassis, at first I used an old E-Maxx chassis and cut out the battery trays to make holders, then I made my own out of some fiberglass angles. I used a velcro strap to hold them down and it is very secure, the battery does not move (because of the tray) and does not fly out (because of the strap). Since your a Revo freak I also have a picture of my converted Revo. Great job on your conversion.