Wow! You went ALL out with this! Respect! I have the same 08 x-2 and getting ready to rework the stereo. I was wondering if you can confirm this for me...prior to rewiring your tower, did you already have 4 pairs of factory speaker wires run from the tower to the locker area? 4 green and 4 purple I believe.
Also, with adding all the batteries, do you think you would need to upgrade to a higher output alternator?
Wish I could hear the system on your boat. I can only imagine how pissed off the neighbors are in the next county