As the costs of front wings are spiraling I wonder if a cheaper solution like a Gurney flap could make sense to alter the lift-drag coefficient of a foil front wing. For example a HA wing, with a gurney flap (if somehow could be attached) c/would in theory become more lifty to make it more suitable for the conditions at hand, while maintaining other parameters like wing span, curvature etc.

There must be some way to apply this concept with foils... Thoughts?

Edit: here is a good explainer of the g-flap: www.formula1-dictionary.net/gurney_flap.html

Given how much my HA wings seem to go to **** with a single ribbon of seagrass on it, i feel like the drag of the attachment would be disappointing...

I thought that droop slats would have worked okay. Fully extended leading edge device when still. As pressure builds they retract. Like a Fieseler Storch. But I decided there's no way to keep beach grit out of any mechanism.