I've had my aloe vera for over 10 years, and since I repotted it into a much bigger pot last summer it has grown uncontrollably. It's now way too tall and top-heavy and bends in several directions, but the top leaves look healthy and beautiful. How can I trim it to repot it, or is it too far gone to save? I do have several of its babies but I'm still a bit attached to this one...
First get the pups growing in a different pot.
After you see signs the pups are actively growing then you can cut off the top and reroot it in new cacti potting soil. I think 20cm or more of stem below the top leaves that you like should be enough, but if your new pot is deeper you can keep more of the stem. It won't hurt it to have that buried and gradually rotting away while it reroots. I would avoid direct sunlight or extreme heat until you see it growing.
If you want to give it a bit more insurance of rerooting you can find some rooting hormone to use.
Keep the new potting soil moist (not soggy just damp) until you see new growth and then gradually change over to what you were doing before but only a bit less since you don't want it to grow as strongly as before.