Just the technique used at 50 is similar to 80 so 80 to 100 may be a similar jump.
It's completely different to cleaning 1st floor domestic properties.
Can't comment on your pole as I've never used one.
I'm not saying its the same as obviously I don't know, I'm just theorising and asking Alex for his comments.
If Emporium can make a 90 footer 5 years ago, technology has come on leaps & bounds so my thinking is that the pole (extreme) may be able to cope, it just comes down to the operator.
And whether Alex will be able to say 'suitable for 100ft work' because its a completely different ball game when someone says 'yeah I've put 11 extensions and it was fine' compared to Alex endorsing and selling it as capable of 100ft.
The repercussions if it snapped could be catastrophic.
That's why I'm not asking Alex to say it, just share his findings (if any, if appropriate & if he wants to)