Hello Tore
Yes the X config works, but the lateral functions (moving sideways) only work in manual mode.
Auto and Loiter still work but still uses the L1 (normal Rover) controller, no lateral movement.
Hopefully these extra functions in Auto and loiter are coming, so we can take full advantage of lateral movement.
With tuning Loiter and Auto still preform well as the boat can turn very tightly, so it is worth building the X config boat and waiting for the extra functions.
Cheers