I have this
li-po. It's got rectangles on the bottom of it like the one in the photo below:
Those of you who are running them in touring cars, are they fitting in the slots cut for Ni-Mh cells, and are therefore a non issue, or do they raise the li-po up? Has anyone tried knocking them off, and smoothing them out with a dremel to get them to sit flush? Would this void their ROAR approval?