[JTM]

yes, when they put the batt n the outside (sticking up from rear window) this creates a higher center of gravity, and makes the cars roll easier and do wheelies. i did this on a Bb (had it under the shell near the center of the chassis on top of the pcb) and i couldnt stop that lil bugger from rolling, mind you it made for som egreat fun (for about 2 hours) then it justgot annoying... my new car has two standard size batts under the pcb, and i can fit the s2k shell on if i want (currently useing a gloria)