GPS selection

[fredvol]

I'am using for the moment:
mRo GPS u-Blox Neo-M8N Dual Compass LIS3MDL+ IST8310

https://store.mrobotics.io/mRo-GPS-u-Blox-Neo-M8N-HMC5983-Compass-p/mro-gps003-mr.htm

the board in a little big , a smaller one woul dbe interesting

Does the 2 compass in the GPS , really needed, maybe the pixracer internal one is enough.
to be honest I 'am not even sure is enable in px4