this has been said before..dont use the clamps....extend pole...hold the hose and pole at the bottom of the pole this will keep it up. when finnished release pole hose and pole slides down..keep clamps for awkward jobs were needed.
Sorry mate , dont get what you mean
I used to do this, takes a bit of getting used to, in the end i went back to using clamps.
Erect the pole on the ground to the height you want it at, then place your hand on the pole hose at the end of the pole and bring the pole up, it wont come down as your stopping it with the pole hose. and when you let go of the hose the pole comes down, mind your fingers tho, sometimes it comes down fast!