I will be getting another van for my business next week and getting rid of my old one as it is starting to fall apart! I am planning on getting a 650ltr upright tank for the new van. I was thinking of transferring everything else from my old van to the new one. Here are the questions... 1) What is the best and safest way to fit the new tank? 2) Should I speedline (or something similar) the new van? 3) What is the best setup for a DI system? At the moment I have a 400ltr tank with twin DI vessels, a varistream digital controller, 100psi Sureflow pump and standard garden hose feed but I'm sure I can get a better & more efficient setup. I look forward to your replies.