What I can't understand is, they follow the route of premium quality components, then mount everything on a crappy aluminium mast. How does that make sense? Aluminium is heavy. Corrosion makes for a constant maintenance issue (at best you have to put on Tef Gel every couple of weeks. At worst your foil seizes up forever).
I guess 90cm is ok for a mast length. Mine is 95 and the shape of the wing brings it up to 100cm, which seems to be the universal standard. Apart from shallow water riding I cannot think of a time when I've wished for a shorter mast. There are so many benefits to a longer mast. I assume there is a factory churning out pre-made 90cm aluminium masts for not much money. It seems like a strange thing to economize on when you've got complex carbon wings and mast and wedge and stuff.
PS The "wedge" diagram is wrong. The text says the wedge lets you foil at lower speed. The diagram shows "with wedge" foiling at higher speed.
A special wedge was created to adjust the angle of the rear wing. This allows the foil to fly at lower speeds, which are less intimidating for first-time flyers.