Sorry, it doesnt make any sense to me Denise
Meaning, I dont agree with the arrows shown....
Unless there is a huge sideways load on the mast (there is some, often, agree, but also zero at times), the mast can be placed 2 meters behind the board, or in front of the board, and your pitch balance and lever will be exactly the same.
If the mast was ultra thin just a superstiff wire, then you would agree with this, that it doesnt matter which way the wing is connected to the board, pitch balance will be exactly the same, right?
Meaning, think if you removed the mast totally from the picture, knowing wing and board was still connected, then the pitch arc would still be horizontal
Not easy to understand, and I know that many windfoilers dont understand this, and think the pitch balance point is where the mast meets the board.
It is not, it is only the "mechanical" stress point, nothing but that.
Sideways mast relative to the wing means a lot, maybe so much that it can change up and down on everything, that is possible.
If you remove the stab, and mount the wing further rear, you have to move the mast a lot forward on the board for balance, but only trying can tell for sure indeed.