So after looking into what other folks did with the seat heater button space I decided to make in into a little extra storage space. The Z is tight and lacks storage space to begin with so every little bit helps.
I simply removed the screws holding the faux switches in and sliced up some black foam board from Michael's. I was just cutting and taped it together as a test fit and after no more than 20 minutes I had a finished box. It is press fit in, no glue or fasteners required. I drop my phone in there when it is time for spirited driving and I don't want it flying accross the seat onto the floor.
I think it cost about $6 to do (along with the oil cooler blocking plates) and total install time was 20 minutes while shooting the breeze with a buddy in my kitchen.
Installed view
Friction Fit
