Don't mess about with a backpack, get yourself a van mount. And backpacks are no way faster than using a van mount!!
they are on domestic hoggy
seriously though it depends on your work
70% of my work in birmingham is 2 and 3 storey town house
with access to the back every three houses,backpack is
def king on this type of work.i use toshes method of strategically
dropping barrels then pick up backpack sling over shoulder off
i go.
normally only two movements per house,when i was using
microbore i was constantly fighting every obstical going and
never liked the idea of draping hose everywhere.
on stand alone jobs, larger domestic properties i would
say van mount has the edge
but on the whole i am happier using my backpack