Ran aground, bent bolt, slight damage to foil box. Cutting board shim and 3° shim (to protect edge of foil box). Made the dolphin, checked rake was at 3° (surprise). Took both shims out, 1° - good stable flights. Gybes w steep angle at low speed railed the board. G: 24,6km/h. 7.8/800 combo: 21,65kn - ok.