I picked up a old but servicable Bogen 3050 with a 3063 video head. I wish to use it with an NPC Prohead (Amrus Shpigel joint) however, the existing head is stuck. I did remove the set screws. I understand that this can be a shortcoming of some Bogens. Assuming a previous owner didn't glue the head on, does anyone have any tips for removing it? Or should I just pass it on to a "kinetic imaging" student?