Hi, l have tried various methods to get better tilt compensated compass heading with the v3 including using merlins/Sail boat Instruments code/calibration (made maybe 1 degree better error result).
I have posted my earlier results on this site,How to use cal data from MagCal/Magneto into AHRS
I live in Tasmania with dip at 72 degrees up and your readings/error -10, +12 (mine at 45 degree roll, pitch had very little error)is as good as l could get.
I built a 2D (roll/tilt)gimbal which has enabled precision to be < 2, more like <1 degree tilt accuracy (because there is no tilt/roll)
I believe you will be dreaming getting better results than what you have depending on your location and mag cal.
The best l know with a V3 in the real world tilting to +35 degrees in New Mexico is -3, +6.
Would love to see one “in the real world which is not on the equator” perform better than above .Read this about tilt error
https://www.tntc.com/optimizing-performace-true-north-technologies-electronic-co passes/
If you want the best accuracy build a gimbal, mine was made from 3 different sized PVC pipe with non magnetic (check with a magnet) threaded rod
as the pivoting points. This is working brilliantly on my yacht auto pilot, using the V3 as the IMU heading sensor.
Regards Kevin
