This is pretty interesting stuff about the 4BAR intake manifold sensor. I thought it was just an issue with Maestro but it's the sensor itself? I'm around 450ft above sea level, and I know exactly what "dead spot" you're talking about, Ed. Makes a slight "chop" in power when letting completely off the throttle for me, or right when you get on the throttle.
Yep it’s the sensor for sure.