Was thinking of doing something similar with the rear seats myself. How do you find the legroom for the kids as they will have to put their feet up on the arch??
They are fine with it - still in booster seats so they dont notice - Ive had friends sit in the back and no complaints there either - You could even take out the front section of the tub out and it would make no difference to movement of the wheels and tyres - a replacement could be riveted in place if you made they out of aluminium.
They are much better than side facing benches - thats for sure !!