I did a search yesterday, did not find what I wanted, threads run on a bit, but I am sure when I was setting up our X6 I found posts with a distance front/rear to balance the car on, we moved the weight to get this and the car seems good.
Will pop a battery (what battery makes a difference) in and balance ours later and see where it falls, of course if any one has this info, pop it on here for Alex