Wayne,

I have been using these for quite some time now with no problems.....All 3 of the units I bought are working flawlessly. I have used another brand and had 2 fail.
The most recent case that made me grateful was: I was flying my 3 meter fiberclassics Extra when we heard the engine start to make a detonating sound....Another club member yelled "Shut it off before it throws the prop" I reached up to the knob on the 10X and killed the engine ,gliding the plane in from a high altitude and then landing....We found that all 6 of the prop bolts had broken off of the DA-150..another few seconds of running the engine would probably have thrown the prop and spinner off destroying the plane in mid-air.. which would have been a BIG $$$ loss.
All I can say is Thanks to Electro-Dynamics for having a reliable product that works.....

Dave