We are allowed to use a mounting plate not more than 100 sqi in, correct? But the plate does not have to be square. My question is, if I were to lengthen one side and shorten the adjacent side (assuming that I wanted to keep a rectangular shape), would it be more advanageous to lengthen the longitudinal (length of the car) side, or the lateral (across the car side).

And I don't want to hear any of this 'it depends' stuff! If 'it depends', please explain what it depends on!

Thanks.