Sometimes get an emitter PCB pixel that lights up faint green

It was indeed that - I remember finding it when I first started using BladeID. It was one of the things that led me to start experimenting with manual array switching, as it meant you wouldn’t need to leave BLADEID_SCAN_MILLIS running all the time. Though as you say, a define to shut it off is another solution.

This was the thread where I know it came up, but there might be others as well:

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