I use the trolley as a sort of van mount nathan, Have it back of my van (on floor) just pop a fresh barrel in and off I go or can wheel the trolley into a customers property.
The hose reel is a cabler one. Made a few mods to it. Its jubilee clipped on the top to the trolley. And I have 2 pieces on metal either side bolted to trolley so that it keeps it in place and spin freely. Just under 100m of hose on it.
Small pouch of front for a few scrims, magic sponges and my bittle of degreader ect. I also have my windows have been cleaned cards in a little waterproof folder aswell as a little change for cash payers.
Its rear heavy due to hoserell and pump box on the back. But with a 25l barrel on its sturdy as hell.
It stands proud in the van mate, perfect fit for me berlingo. I have a hook on the top of my van so it hooks into it and cant fall forward. So basically it stands up right by the door hand have 14 barrels or so in the van.
Simple and basic. Nothing to go wrong on it.
No flow controller as a tap is fitted end of my pole hose set to medium giving me a good flow rate and can be turned up for FC.
Hope that helps