I have a z520 with remote oil fill. I am looking in the back compartment and it seems like there is wasted space. My old boat I could store spare oil bottle and some other tools in there. I have 4 G31 batteries, charger and the oil tank in there now. It looks like I may be able to fit the 3 TM batteries in the port side as they are each about 6.75 inches wide and the compartment is about 23 inches. Then the starter would be in the starboard side with the oil tank. Will this put me too far off balance? right now it is set up with a single in the starboard, single in the middle, and 2 in the port. I plan to move my spare oil bottle into the Starboard side and some tools in the center along with jumper cables etc which are all stored in a compartment behind the driver seat.

The other option may be to put 2 in the middle but I am not sure if that will fit or not with the charger there. How do you all have yours rigged to maximize space? is the balance an issue?