Surprisingly, it looks like this layout is much better balanced than I expected. It also is heavier... I got readings on the two scales (pretty accurate cheap digital ones for just $20 each with capacity of 400# each) totalling 1450# at the front wheels, and 1495# at the rear. So, now the decision is whether its easier to modify the existing rack a little, or re-fab from scratch to move a couple more cells up front and re-balance. I haven't removed the tow bar from the front, so that would lighten the front probably another 40#; so I'd want to move a couple cells to the front if possible...