If I may add a comment on mast positioning, I think that it is dependent both on rider's weight and on his/her weight distribution habits.
In my case (110kg) I need to push the mast more forward than what I do with my other standard surf foiling setup to be able to ride with the same position on the board, by minimum 5 cm.
Part of it can be recovered by narrowing the feet stance, but I found that unless I push the T1 forward enough compared to my other foil I find myself working practically only on my back leg, leaving the front light as a feather
By the way, am still amazed by it: I had "pensioned" mine as I was trying to learn to jump and preferred the ease of my other foil as a complete jumping newbie. Yesterday I used the T1 again after probably 2 months, and in waves, and was amazed that I got up and riding immediately
It is a fun wing.
Can't wait for the forthcoming evolution with higher size, which hopefully
may serve better those like me who can never seem to be able to keep the fridge and the cupboard alone!