Good to hear Chris..
I wouldn't say little KR like that is false. There's something that set off the knock sensor. Maybe a weak coil on one tower or a wire arcing slightly through the coating etc. When was the last case learn? Something that just that little bit effects things. If you tossed more timing at it, likely you'd see more knock. Heck..it could be that the torque of the sensor was a smidge off. The torque of the sensor effects the sensitivity.
If you think it's false, turn down the sensitivity in the tune and run as much timing/boost as you'd like w/o seeing any knock. I don't think that would be good long term though.
Most of the blocks I pull knock sensors out of have a build up on top of the sensor. It's tough to tell how that effects the readings, because the only time they usually get pulled is when something broke etc.
