Midrat advice?

[nicefrog]

I'm part way through converting my Madrat to mid motor. In fact it's all layed out ready to be finished. But I need some advice so I thought I'd ask what is the official best way to run the battery? If I run it so all the weight is in one spot in the chassis with the pack sideways up against and parallel with the motor the weight balance on the car will be similar to stock (but with it all on one area) rather than over the whole car which I guess will make it more turnable. I can also run the pack the length of the car and relocate the servo so it's more like a DF-03. Any ideas are welcome