Thanks for the reply! What I mean is not necessarily the the fact that you can adjust lengths (though this is a part of it) but the fact that anyone can take the cylinder apart. The only thing you need is a kind of screwdriver to take out the 2 screws at the bottom in the following image.

Most cylinders don't have these 2 screws, instead they have a ring over the cam to keep the cylinder in place. You also need tools to keep the pins in the bottom part in place. I believe the reason that with this Kaba cylinder it is so easy is because the whole locking mechanism is contained in the one small cylindrical part (most left part in image).
I'm looking for cylinders that have an easy way to take them appart, similar to the KABA penta design. I believe that having the pins "up in the cylinder" instead of more down towards the bottom like a traditional pin tumbler lock is what makes this possible. Hope this makes it more clear

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