Hi all, i have just brought a bigger machine (wesley storm 200p 11hp honda with interpump ws201 200bar 15lpm) and compared to my old machine its massive. I used to be able to easily lift my old machine in and out of the van but struggling with this one and don't want to have to carry a ramp around so im thinking about fitting a buffer tank and leaving the machine in the van as i only seem to get domestic work, but i've only got a little partner van so would a 250l tank be big enough? and what would be better flat or upright ? as i would want a float valve in it and what else would be needed?