This issue has probably been discussed but nonetheless I thought I would mention it just in case.

In empire when vader is in his meditation chamber and his helmet is being positioned in place you will notice a small glob of white glue at the top of the helmet that breaks free when the clamps release.

I remember seeing in a documentary somewhere that the glue was used to connect the helmet to the clamps since they were pretty flimsy. I was wondering if Ady was planning to remove the glue since it serves no "in universe" purpose.