A very good sunny & windy day, as an Xmas gift for this summer, where normally wind blows very slow. Yeah, luky me :-))

Patrick F-RACE 120 2023, Ezzy Lion 7.5, Bug SLEM 35 s-

I'm not able to go faster than 29kn with this rig: I feel very unstable over this speed and I feel to become dangerous... can someone help me?

The straps are set all out and back, the sail is rig like a slalom sail, the footmast is set all back 'cause this board is "attached" in water and never fly away...