Although they are called freeride, I think they are more like freerace wings. I read the info from the F4 page; looking for reviews. I have the starboard course foil (millennium) and I wonder how much earlier would the 90 take off and speed and upwind differences.
I have not talked to the Sailworks crew about the F4 wings but I am sure they have ridden them and can give you an idea how they perform compared to other foils. Just send them an email or call them they are great to deal with
I was in the Sailworks shop a few days ago and talked with Bruce about the F4 foils.
1. The F4 masts are, by far, the stiffest out there. There is no left-right hunting at high speed.
2. The freeride wings were designed with direct input from Sailworks. Start with this such and such wing, add a little sweep, change the tips a such and such way, add or subtract dihedral/anhedral, etc. Specific changes. F4 did those things and now has a line that Sailworks likes. Yes, they have ridden them. Like AFS wings, F4 wings are solid carbon.
