Rather than start a new thread I'll continue here..
I have used the Ninja pole today for the first time and I can't fault it. The pole is light yet very strong and without clamps, makes it much easier to extend and collapse. I did have my doubts as to whether it would spin when collapsed, but there was none of it.
I started the day using a superlite brush and quickly changed to a brush that was 120grms heavier. In my opinion it gave better scrubbing power without unbalancing the pole. This is NOT a recommendation, purely my own preference.
All in all, I doubt that you would find a better pole for the money anywhere on the planet and it compares favourably with many more expensive poles.