Well I finally got my butt in gear and did my WVO install. Includes a heated 135 liter (~35 gallons) aluminum tank cut to fit with about 3/4" clearance to each frame rail as well as the exhaust. Has two hydraforce valves so I won't get any contamination and the dependability of high pressure/temperature hydraulic valves (not the cheapo 6 port pollack things).
I also put in a sight line to ensure I don't overfill and an easy to use marine filler that even says 'waste'
I also thought you'd be tempted to relocate the clear sight and the sump like the one we did on my tank but since it's a grocery mobile... But really, nice set up and so nice to have all that room to work with!