I had the same problem.
How I overcome it was to use a spare 3/4 length broken section and taper the pole with a few rolls of electricians tape, (thin at top, wide at bottom). Then the 3/4 length section (broken pole taped up wedged conical shape) will fit almost every section as that 'extra short length' when you need it most on windows where the ground is on an incline and you're restricted from stepping off a pavement onto a busy road, etc.