The current Royal Family Bindings; Duke, Baron, F12, F10, Schizo, Jester, Jester Pro, Griffon and Squire all use the same jig. The Duke, Baron, F12, F10 and Schizo use 9 screws there is an extra screw(hole) in between the toe and heel piece. The Jester, Jester Pro, Griffon and Squire use 8 Screws.
If your are going from one of the bindings with 9 screws to 8 screws the hole in the middle just needs to be plugged.