Our IMU has a very small indicator lamp at its base on one side. It flashes: 1-green, 1-red, 7-green in succession.
At this point the stability and flight characteristics in both Atti and GPS are not nearly as good as our WKM running FW: 5.22
Already replaced the compass, which was bad right...
We flew the stock motors at 8.5lbs for over 2 months at around 160 to 200 degrees F without issue.
The motors are now pink instead of red and they still work perfect with smooth bearings and all.
Very impressive but not recomended.