David (and gents) that’s a nice plane but?

Why that horizontal sheeted tail plane has a diamond shaped profile?
And that Wright Flyer fin?
It looks like a jet with Wright Flyer tailfeathers.

This plane is for shore not designed by Ed Kazmirski.
Or diamond shape and silk covered (1961 and older ) or sheeted with a good profile (1962 and younger).
Will the plane be SPA legal with a good profiled tail planes? At least it will fly better for the same investment costs because all you have to do is throw away less wood.

NACA 0009 smoothed, me seems to be a good choice! What do you think?
And if you already fly the plane?
I would remove the diamond shaped and modify the plane with a profiled one and would do that with that fin also.

Or do I say something wrong?

Cees