I just ordered my Gear Vendors Overdrive!

i think i read somewhere that if the O.D. is on and you if you shift into reverse that it can damage the unit . if that's the case it is not idiot proofed enough for me . they are very nice , good luck with the install.
They have electronic control to prevent that. I consider mine idiot proof. I set it and forget it. I just deactivate it for racing.