We are mounting Favero Full-Arm 01 machines with repeaters on our practice strips. They will be mounted too high for the vertically challenged to reach them to switch weapon settings. I've seen these installed with a selector button mounted on a wall near the machine. Pushing the button toggles through the 3 weapons. Can anyone here tell me where I can find the instructions for doing this? There's nothing in any of the Favero manuals I've been able to retrieve from the net. Thanks!