I'm not trying to be clever and think that ME and MY Backpack can wash you Vanmounts away

Although, on varied domestics, I think I could

I just wanted to compare the 2 systems....................................
In fact why not add in a trolley system?

At a trade show would be good. It may give us and newcomers an idea of the pros and cons of each system.
Bear in mind I have my Backpack set up on a rack so I can fill up and put it on quick and easy. A turn round time from window to window of, on average 3 minutes.
Thats 1 minute to get back to trailer.
15 secs to drop of backpack.
30 secs to fill
15 secs to put backpack on
and 1 minute to return to job.
Note, this is average. The travel times may vary but I have sorted my round so as to reduce to a minimum.
David