I have been playing around with my mast settings. Sometimes I move it forward, sometines I move it back. Generally I keep it in the middle.
Do you move it forward or back in stronger winds?
or is it something to do with sail size.
Most boards only have a small track, my Tiga mast track is about 60cm long. It use to slide forwars and back by pressing a button with your foot. I never used that function. I just set it and forget it.
On new boards you really don't move it, as it depends where the rocker flat is. IE there is a right position for 90% of your sailing and you leave it there.
On my waveboards I sail with it in the same position always.... unless it is way bumpy I may move it forward about 10mm.
Maddog if you are talking about your Carve - put it just behind centre and leave it there. Unless you are trying to use a long boomed 1990 model 7.5m on it.
Get a knowledgable person to loook at your whole setup and even better sail it, and advise you.