If you have the flexibility to select a front wing that is bigger than stock, don't hesitate.

Up in Seattle, the guys who have been windfoiling with Slingshot have been getting the Infinity 76 (1534 cm2) and 84 (2066 cm2) wings, and have not looked back.

My own experience has been similar. I weigh 90 kg and foil mostly in 12-20 kt winds with 5.0, 5.6, 6.4, and 7.0 sails. When I started out with a 779 cm2 wing, it was either lifting too much or not enough for the board speed I was comfortable at. The control window was narrow. I porpoised all over the place. I think the solution would be to just go faster, but that did not seem to work, either, at least for me.

When I got a 1120 cm2 wing for that foil, everything changed dramatically. It was easy to balance the pitch and just ride it for long flights under total control. The board speed was same as with the smaller wing, but the control was MASSIVELY BETTER. Even using a 5.0 with this wing under a formula board with 20 kt wind worked surprisingly fine.

So, I have 779 cm2 (AFS-2), 940 cm2 (LP), 1000 cm2 (hybrid), and 1120 cm2 (AFS-2). i will go back to the 779 cm2 when I get better and can maintain higher speed.

The point here is don't hesitate to try bigger front wings, and pay attention to wing area. Those Infinity wings are HUGE, and they lift nicely at slow speeds. When you bear down on them by moving your weight further forward to reduce the angle of attack, they go plenty fast.

The Seattle guys are also saying that there is nothing is good as a huge wing underfoot to learn to jibe without losing flight.

You will notice that most of the these big wings are made for SUP and surf foiling. However, on the modular foil designs with interchangeable parts, you can attach them to windfoils just fine. Slingshot is a great example.