Alex,
My fishing pole has the following dimensions
6 sections (can be added to)
Section 1 inc aluminium brush adaptor. 150gm/83 cm
Section 2 140gm/166cm
I use the above (very light) sections together for most downstairs work and bungalows (using the top section only where access is tight/awkward.)
Section 3 400g/160 cm covers top windows on "council house type heights"
This one gets the most wear and tear and has been heavily repaired by me and beefed up!
The whole pole to this length is 3.9m/12'6" 3.9m
Section 4 200g/173cm for higher older domestics/commercial two floor work and where I want to stand further back
The whole pole assembled to this length is 5.5m/18ft
Sections 5/6 260g/360g 175/178cm use over conservatories, 3rd floor farmhouses and flats, 3rd floor businesses
The whole pole is 7.8m/29ft and weighs 1.450kg at this length without brush and hose.
What is the extended length and weight of your pole? How heavy are the additional extensions?
Sorry it's wordy (and nerdy!

) - thanks in anticipation.