The closed hole in Futaba servos must be new, all of my futaba servos have a slot/hole in them for the grommet to slide into, I also have the square type grommet that slips on. I would hope that Futaba goes back to the older type of mount it sounds much easier that having to push the grommet into a hole that always seams to tight (always hated that when I was in the electronics business).