I was using, and still have a 35ft Extel Hybrid pole.
The Ergolite, at 55ft, is no heavier than the Extel, is slimmer and stiffer.
The Extel is shorter closed so is easier to use if you want to use one pole for everything from ground floor to four storey work.
As for the answer to my question, thank you, I should have realised that myself.
I guess a modular pole wouldn't have the same problem.