I currently use the Bayersan trolley with 25lt drums to do my round and it works fine, but I really want a tank in my van so I can use more water and not have to lift 20 25lt bottles every time I want to load up my van. I plan to simply extend the line with strainer that would go into my drums, to go into a 350lt mounted baffled tank, keep 4 drums in case I need to use the trolley as well. Has anyone else done or does this method? Do you think it would be ok to do this? would I need to modify the tank lid to put the trolley line in, or do the lids have holes premade? Lastly should I get something like an aqua-adapter if I'm using my trolley as a van mount? Thanks in advanced guys.