I like Dave's foil concept. Is it stable in chop/wave action?

Could something similar be designed for a sloop rig with spin? I think it'd be neat on an old Taipan 16 footer that didn't fit the F16 rule ...

Or even better, if you could just switch out the F16 compliant daggarboard/rudders with foils so you can sail either way... But that's probably asking way too much...