ive been using a 22 SLX for the work thats due this week.im cleaning lots of very compact estate work.lots have awkward windows above extensions/conservatories etc.also ive got a few commercial offices to clean which i used to clean with a 25 SLX at full stretch.
first thing i noticed was i thought they had forgot to put the pole into the box its thats light!! 
the pole is now ready to go.aqua-daptor MK3 XL fitted.45 degree carbon gooseneck and the new extreme brush.
i think i need to be a bit more careful when shutting open upper windows as it doesnt feel as robust as an SLX.
ill let you know how i go on for those that are interested. 
regards
dazmond
Hi Dazmond
You will need to be more careful when opening or closing windows with an Xtreme - it can be done, but only using certain methods. If you following the steps below it should work well:
The way to shut sideways opening windows with an Xtreme pole is as follows:
1. Stand further back from the window so that you are pushing the pole into the window along its length – thereby reducing the lateral pressure
2. It may help to extend the pole up by another section to allow you to stand back a bit.
3. Rotate the pole by 180° in your hand so that you can catch the top clamp on the pole on the bottom edge of the window. This reduces the lateral strain again and eliminates the levering effect of the gooseneck.
To shut the top half of a Sash window with an Xtreme pole:
1. Stand closer to the window so that you are pushing the pole up into the window putting all the force into trying to compress the pole – thereby reducing the lateral pressure
2. It may help to retract the pole up by another section to allow you to stand that bit closer.
3. Rotate the pole by 180° in your hand so that you can catch the top clamp on the pole on the bottom edge of the window. This reduces the lateral strain again and eliminates the levering effect of the gooseneck.