I got a couple Happ rotary joysticks from a local dealer, they come pre-assembled.  They don't have the little E clip on the bottom of them because of the rotary switch.  There are a couple of tiny screws that look like they can be undone with an allen wrench that go into a plastic piece on the joystick shaft above the rotary switch.  Is this what I unscrew to remove the joystick shaft so I can mount the stick into a control panel?  Is it easy to replace?  Or is there another way of getting the stick into a panel?