Hope you get it sorted one way or another as using your car and backpack must be driving you nuts by now.
nope its not!im pleasantly surprised just how much work i can do!i fill up at lunchtime at a customers outside tap so im using 240L a day and still doing the same amount of work!
what im finding is theres virtually no difference between using a van mount and a backpack for most work.maybe an extra 15-20 mins a day compared to van mount.
dont forget theres no reeling in/out with a backpack and less snagging.
there are a few jobs where ill have to skip them for now(one s where i need the 47 footer and excess to flat roofs)but most work i can do.
also whats surprised me is im enjoying doing a bit more trad work on ground floor windows.it mixes it up a bit more.