I'm using 3/4" plywood, and my thought was to bottom mount the Sanwa JLF-TP-8YT without routing - I know, I know, with a 34mm joystick shaft it'll leave just 15mm when mounted, so it'll be less than 10-15mm below the 'standard/normal'. However, thinking back to the Galaga Cab, the joystick also has a very short shaft....so thinking maybe I could get away mounting this way? What is the disadvantage of having a joystick shaft shorter than the norm?