I ordered the 25 but plan on using it as a 20 without a section for everyday use.
Some days I use my slx 18 all day on other days I may only use it on half of the work.. need something longer and at the moment the only other pole I have is a clx 27 which is horrible on an angle.
I think the 25 should cover me for everything except maybe half a dozen with veluxes
just leave it as a 25 footer adam.....honestly these poles are sooo light....you dont need to remove sections!plus its better NOT to extend every section fully all the time anyway....much better to vary the clamping on the sections for a few reasons.....
1.it makes the pole super rigid...
2.it distributes the wear on the sections more evenly
3.less likely to snap a section if you not fully extending all the time
4.sometimes its better to stand further back from a window to cut down on neck strain(which you cant do with a shorter pole)
5.itll save you time having to go back to the van to add a section for those higher windows/velux,etc....