The more things I add to the back of the II the more I feel that I need to do some kind of custom cabinets to fit things. I've already removed the jump seats to make more room. Has anyone replaced the lower interior (black parts) and done an alternative cabinet system for the sides? My feeling is that there could be a lot more usable space if you just did from the rear seats back with say diamond plate or similar and put in doors to access things like air pump, amp, etc, and could even build in the subwoofer cabinet.

Would love to see what other people have done. It just feels like it's getting messier and more inaccessible every time more goes in.