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Mast Track
The placement of the mast track (how far back or forward you attach your rig) is very important in optimizing the wind range of your board. In the past we have all been told to move the mast foot forward while using larger sails. Well those days have come and gone with the introduction of better, more stable sail designs. We like to start with the mastfoot towards the back of the track - this may sound backwards but it really works! By starting aft in the track it does two things: it allows us to get in our back footstrap easier in light wind; and it helps power us up quicker as the mast is standing up straighter. Anther reason for moving the mastfoot back is to get rid of that "sticky" feeling a board has going through choppy water, effectively giving the board more lift out of the chop. The only reason for moving the mast forward is to keep the nose of the board down when it starts to feel "flighty" - then only move it forward a little at a time until it feels comfortable.
Remember, a little bit of flightiness = fast!
Mast Forward = Good Upwind Performance
Mast Aft = Good Downwind Performance

Boom Height
A poorly adjusted boom can and will affect both nose trim and foot stance. Some simple rules are: Many people set their boom to "chest high" or "chin high." Good places to start, but like everything else that's adjustable, there's more to it than that! In light air, if your mast track is most of the way back and your board feels sticky, or you're having trouble getting into the back straps, move your boom UP. This will not only set you up further back over your straps to get in them easier, it will also make the nose of their board trim up higher. As the wind increases, the board will become more flighty and you may experience the feeling of your front foot pulling out of its strap - this is caused by your boom being too high or your mast track too far back. Do one of two things, or a little of both: moving your boom down will move the centre of effort forward; and putting more weight on your front foot or move your mast track forward, thus controlling nose lift (or flightiness). This will stop your foot from pulling out. Mast track and boom height work hand in hand. Getting proper trim with both isn't easy and requires a lot of attention, but if you're willing to make the effort and come in off the water to make the adjustments, the benefits will allow you to sail faster, and increase the range of wind you can sail in, making your board more enjoyable to sail.

Sail Downhaul
Reading your sail rigging instructions is utmost important. If you bought your sails used, maybe check the sail manufacturer's website, or their local dealer for proper instructions. Incorrect downhaul will affect the way your board trims out. It is true that less downhaul will make the sail fuller for better light air performance, and as the wind strength increases it's important to pull more downhaul - reasons being that if the sail is used in more wind, the draft will remain higher up in the sail, forcing the nose of the board down making it stick. More downhaul in more wind will lower the draft in the sail, pushing it forward and give the board more lift, freeing it up and speeding it up! Too little downhaul can also create spinout: the centre of effort from the sail shifts back and up, loading up your back hand and your back foot, creating more pressure on the fin and...spinout!