I've had this little cactus for 4+ years. A couple years ago I made the mistake of moving it too far from the window and before I knew it it grew quickly stretching towards the light . I've since kept it in better conditions and the new growth it looking good in my novice opinion.

So what I was wondering is if there is anything I can do to improve the appearance. I know the part that's stretched isn't fixable. But would I be able to cut the top off and sort of start over with the new growth?

Also if anyone can ID that'd be appreciated.