Wow been some great correspondence on this subject from asking what bit size to full van rebuilds and I must say all very interesting reading from very knowledgeable people.
Now perhaps I can make it more simple for us not so handy. I think Rob had it sorted when he first got his van. He took his time thinking about the layout so much he threw a mattress in the back, parked next to a pub, used it for meals, toilets, and of course the occasional pint or two. Then one night fell in the river Ouse, that was his shower sorted out for the weekend. I think that must have wetted his appetite because after that he seemed to make faster progress with the conversion and its now nice and posh. Alas he still parks next to the pub so rarely notices his handy work, but well enjoys his stopovers. All I am saying, if all else fails, chuck a mattress in the back.
.... Tom ....