Building Fool-Flying Noob
My brain is not wrapping around this terribly well. Do you have a picture or an image?Try putting a strip of 1/64" plywood on each side of the fins where the dowell supports attach. If the ply runs from root to tip you will be amazed at how stiff the fins become.
I have been making some good progress on this. I have it nearly ready for maiden. Mostly just internalizing the wires and battery