We did it :)
Took us a while to measure it all up and cut the wood to size. We're shaped it nicely at to back, so the top part sits flush against the cargo barrier, but power down is open to give ventilation at the back of the fridge where the fan outlets are :)
We haven't cut the holes in the side yet - we'll do that in the coming weeks when we have a bit more time to cut the holes and glue the carpet around the holes to stop anything catching on it.
So we used 12mm marine ply, some small brackets on the inside of the joins, and metal strip along all horizontal joins, and also a half-height panel across the back to make it more rigid.
Attachment 54188
Finish thing:
Attachment 54189
We've tested it, and the gazebo and tent still fit nicely across the top, and the fridge opens nicely too :)
Pretty happy with the result - although it took us a while!
Now we're ready to fit the new water bladder in the back tonight and lift kit, snorkel and recovery points go on tomorrow at TJM ..... super excited!!! :D