boom height... Boom height has a direct impact on performance. A low boom will make initiation of planing difficult. An overly high boom promotes early tail walking and makes maneuvers difficult A good position to begin is chest/shoulder level. If there is too little wind for the sail size being used, the boom is best raised to assist the initiation of planing. A higher boom places more of the windsurfer’s weight onto the rig, and less on the board. Consequently, the board has a greater capacity to lift and plane. If the wind is strong for the sail size, lowering the boom will give the windsurfer greater control. With a lower boom position, the rider’s weight becomes more board oriented, increasing board control in rough conditions. Generally, if you feel overpowered, try more downhaul, more outhaul, a lower boom and the mastfoot further forward. If you want to trim for more power, free the downhaul 1 or 2cm, free the boom 1 or 2cm, and raise the boom a few centimeters and move the mastfoot back.