How to control a quadplane in GUIDED mode?

I’m trying to control a quadplane with a Companion computer and when executing the MAVLink SET_POSITION_TARGET_LOCAL_NED command, nothing happens. It looks like this command isn’t supported by Plane.

What could I use instead? I need a lot of precision here, e.g. move 10 cm, so MAV_CMD_NAV_WAYPOINT is not a good option.

Thanks in advance.