Something more for Kowal. I just ran across another one of those "double click" situations on one of the HAPP sticks. But before I go on, I want to make sure that it's understood the the switch actuates perfectly normally, and it's only an audio anomaly, not one that affects operation. IOW, the contacts themselves make one click and stay there. It's not an oscillation.
It was one switch that was doing it. So I turned the actuator and it did indeed follow the actuator. I noticed a very slight rough edge on the actuator, so I cleaned it up a bit and as if by magic, the sound went back to a single click.
But here's the funny part; I pulled one of the IL sticks off the shelf (still have a small stock of them set aside). I put it together to double-check the angle of incidence against the switch actuators (to humor Kowal) and not only did it make the exact same "double click" noise, it did it on *3* of the switches! Actually a worse scenario with the IL stick than the HAPP one, and the angle of incidence is exactly the same.
I think it's safe to say that that "this myth is busted".
RandyT