[OverTemp]

The GV-1 was cheaper than a normal tach for me.

I just dialed in the heapspeeds I wanted and then turned the GV-1 on and off using a switch on the radio. If I heard an RPM change I adjusted my curves until I no longer heard the change. This is MUCH better for setting curves because it can be used in any phase of flight with only one person doing the work. I had each curve, except normal, mirror what I wanted from the governor (idle-up). I had the GV-1 set to release the throttle to the radio at about 1/3-1/2 stick in normal mode and obviously throttle-hold.

I normally flew with the GV-1 on, but I could fly with it off if I wanted. If the GV-1 failed or threw a mag or sensor I wouldn't be at risk of over-speeding the head... it would revert to the throttle curve I had selected. I might not even notice unless I was doing high forward speed back-flips.