Am not a fan of them trolley set ups, am guessing that still needs a tank to draw from.
I went for a van mounted one that can be bolted down floor in the van mate, a little bit bigger than 15 lpm, which for the extra few hundred pound is defo worth it,
I got mine off this guy down Leicester ways, which to be honest is not really on my door step, as am in north west, right nice guy he is. Took quite a bit of high pressure hose off him and a fsc, he's answered all my enquiries and helped me along the way. ............... Even after he had my money
His name ................... What's his name, .......................................... it's gone mate but I will remember 👆⬆️🔼⏫🆙