As PG said...........
On wide boards, hitting the "lift off mode" can be achieved pretty easily. Sheeting out is disaster, so it's counter intuitive to keep the power on, but you must keep powered plus downward pressure on the mast base (hang your weight in the harness). Yes, move the base further forward in the track, it will help too as well as a smaller fin.
Formula 160; iSonic 111; HiFly Move 105; Tiga 263; '85 Mistral Superlight.
Maui Sails TR 11.0; 9.2; 8.4; 7.6; 6.6; Maui Sails Switch 6.0; 5.2; Maui Sails Global 4.5; 4.0.