have to be honest darren,just bought a stystem off fleabay,300l for £260-comes with flow control/tds meter and pump.
i have heard ionics are good but think against what i could do diy there would be a difference in quality and the final finish of things.guess these guys have workshops for fabricating where i have my back garden and "cobble it"to fit in the van-both equally usable and does the job but one will look more finished than the other,important for me as i need to downsize a bit as me mate kempy had a cross with the vosa people on the weighbridge and had me thinking i need something a lot better than what i have