Had a new van last year and thought about what system to use and put in it. I'm happy at building my own as its a lot cheaper and you get what you need. so last year I contacted Stephen at Aquaeous Plastic Fabrications with a design for a tank for my van. I wanted to think outside the box and go for something totally different. so I designed a flat tank measuring 1200mm x 2200mm x 220mm and to have a sloping floor towards the outlet. Stephen did a great job and this has allowed me to still have the whole use of the floor of the van. It drives so much better with having a very low centre of gravity. So glad I went down this route. the van is still a work in progress and there is still a lot that I still got to do with it, but will get there one day. as you can see with some of the pictures there is plenty of room in there still. so much room that I can still get a full size bath in it and still able to go out working!