Here are some images of my new eM3 layout.
Chassis was cut today!
Note that the belt layout has been re-arranged to accommodate batteries on each side of the chassis which creates equal mass from side to side.
The batteries can be mounted either vertical or horizontal depending on how you want to manipulate the Center of Gravity.
Obviously some parts are missing. i just wanted to share some ideas with the layout.
This setup should fit most standard hardcase lipos, 2 and 3 cell X 2 as long as they are 138mm or less in length.