[howdy20012002]

I personally wouldn't cut it
you could probably get away with it as long as you didn't touch the worm. However, I wouldn't just to be on the safe side.
If you do decide to make sure that you can feel where the worm is in the tube. As long as you don't get between that and the opening, that you should be ok.
Like I said though, I wouldn't just to be safe.
As fanatic said, Featherdusters will glue themselves pretty quickly actually to whatever it is that they are near. On that note, try to make sure that you want it where u put it. They can become tough to move once in place. You would need to basically need to use a scalpel to cut them slowly away from the rock...slicing away the gluey substance as you went along.
hope this helps
Neal