Why am I unable to select the compass(magentometer) I want?

ArduCopter Copter 3.5
1

(AC3.5.7)
I wish to use the second device: (posting related settings)

COMPASS_DEV_ID,466441
COMPASS_DEV_ID2,466433 < This is the one I want to use
COMPASS_DEV_ID3,131874
COMPASS_EXTERN2,1
COMPASS_EXTERN3,0
COMPASS_EXTERNAL,1
COMPASS_TYPEMASK,32
COMPASS_USE,0
COMPASS_USE2,1
COMPASS_USE3,0
COMPASS_PRIMARY,1

With those settings, I would expect the 466433 device to be used.
Yet, graphing RAW_IMU shows response when I bring a screwdriver near 466441 device, not 466443
I also tried COMPASS_PRIMARY,0 (in case COMPASS_USE,0 were making it not count at all…)

2

solution: RAW_IMU is reporting first magnetometer, not the one selected as primary. So it’s working as intended.