Air Chair Advice

Just bought a used Air Chair for $250 from Craig's List. I think it's the Stealth. The graphic is a gorilla and it's got an aluminum seat with a polished aluminum foil. The rear wing on mine is curved up like a U-shape. I read online that there were two wings available- one flat wing for beginners and one curved wing for experts. I've rode these a couple of times and I think I rode one similar but with the flat wing. The flat wing seamed to be way easier to fly around on. On the chair I just bought I can taxi just fine, but as soon as I try to fly it, I just keep porpoising until I face plant. I realize there's a lot of technique that I need to learn, but it seems like I had an easier time the few times I tried before on other chairs.

Is the curved wing going to be way to hard to learn on? Is there a way to tune it to make it easier to get the feel for? Do I need to get the flat wing? Does anyone have an old beginner wing for the Stealth that they are looking to let go for cheap?

I can't really justify spending $170 direct from Air Chair for my $250 chair, especially since I'll only use it occasionally.

That wing will have a much steeper learning curve than the standard wing for sure, Check the FoilForum for a used replacement or possibly some riding and tuning tips. The SkySki is going to be the most user friendly foil out there,

you're probably not going fast enough. Try 30-32.