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I finished my fridge base / battery box / charger arrangement last weekend.
Making a single sided base is definately doable but the space left will be quite small. Especially when you consider that the back of the folded seat is the same level as the side trims so the fridge will be sitting down 100mm or so in a hole. Few options I know if you have to have the extra seat but to be honest I am not sure it is worth all that trouble given (I believe) there are some proprietary mounts that sit on top of the other seat. That does mean limited height to open the fridge but weigh up the advantages before you go out and buy ply and carpet and bolts and nuts.
Building this set up, which includes the battery/charger box, probably took about 50 hours all up. Probably cost just under $200 excluding the battery box and innards. Sadly I didn't need to buy any new tools (have to plan that better next time). To build the board I used the usual cordless drill, jig saw, circular saw, belt sander and also a rivnut tool and a 1/4" router to take the corners off the ply. In that total was 1.5m of marine carpet and 3L of adhesive, the plus side being I have no need to use an aeroplane to fly anywhere for the next week or so.
The 8 bolts that hold the 3rd row seats in are M10 with a 1.25mm pitch. I struggled to get countersunk screws in this size that were long enough and ended up with socket head screws 65mm long which were fine because I refitted the factory tie downs (drilled out to suit the M10 bolts) and left one exposed under the fridge. I used M8 rivnuts in the top hat section at the front (where the seat frames bolt in at about 45 degrees) and countersunk screws, again using the factory tie downs and one bolt under the battery tray in the battery box.
Also when you remove the trims be aware that some of the pop in connectors are open under the floor so seal all the holes you don't use, I used a thread sealant as well on the bolts. I also had to seal two M6 holes where the factory trims sit as the heads of the bolts lifted the base board. There are some pre carpet shots in my rig build if you want to see all the words and lines on the bare board, including the phone number of one of our Directors in Japan! Please feel free to call him.
Making a single sided base is definately doable but the space left will be quite small. Especially when you consider that the back of the folded seat is the same level as the side trims so the fridge will be sitting down 100mm or so in a hole. Few options I know if you have to have the extra seat but to be honest I am not sure it is worth all that trouble given (I believe) there are some proprietary mounts that sit on top of the other seat. That does mean limited height to open the fridge but weigh up the advantages before you go out and buy ply and carpet and bolts and nuts.
Building this set up, which includes the battery/charger box, probably took about 50 hours all up. Probably cost just under $200 excluding the battery box and innards. Sadly I didn't need to buy any new tools (have to plan that better next time). To build the board I used the usual cordless drill, jig saw, circular saw, belt sander and also a rivnut tool and a 1/4" router to take the corners off the ply. In that total was 1.5m of marine carpet and 3L of adhesive, the plus side being I have no need to use an aeroplane to fly anywhere for the next week or so.
The 8 bolts that hold the 3rd row seats in are M10 with a 1.25mm pitch. I struggled to get countersunk screws in this size that were long enough and ended up with socket head screws 65mm long which were fine because I refitted the factory tie downs (drilled out to suit the M10 bolts) and left one exposed under the fridge. I used M8 rivnuts in the top hat section at the front (where the seat frames bolt in at about 45 degrees) and countersunk screws, again using the factory tie downs and one bolt under the battery tray in the battery box.
Also when you remove the trims be aware that some of the pop in connectors are open under the floor so seal all the holes you don't use, I used a thread sealant as well on the bolts. I also had to seal two M6 holes where the factory trims sit as the heads of the bolts lifted the base board. There are some pre carpet shots in my rig build if you want to see all the words and lines on the bare board, including the phone number of one of our Directors in Japan! Please feel free to call him.
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