Got an opportunity to put the Z4MC on corner scales at the NARRA Watkins Glen event this past weekend. The car is a 2007 with navigation, power seats, upgraded Harmon Kardon sound system. It has StopTech 4pot BBKs at all 4 corners, BBS RGR rims with PS2s (18x8.5/18x10, 245/40F, 275/35R), Remus cans and Euro M3 headers. The gas tank had 1 gallon less than a full tank.
Without me in it and an empty car.
With me in the car the balance is close to perfect.