Sorry for the confusion, that's the engineer in me. [8D]

But actually it's simple, I compared the airfoil as "furnished by Ed Kazmirski" (pic 1) to a NACA 0020-33 mod (pic 2), to show that the airfoil as furnished by Ed is essentially a symmetrical NACA airfoil. The NACA outline is laid over Ed's drawing.

Then I generated a NACA 2419 mod airfoil because all our sources tell Ed used it for the Taurus. If the "NACA 2419 mod" outline is laid over the "Bosch airfoil" drawing and turned -1.17 degrees, both airfoils match in most of their top outline.

Therefore, reversing the wing saddle to use it as the bottom side is not too simplistic. In fact, I guess Ed could have done just that. But note the small difference near the leading edge. I think it could be even simpler to find a pantograph and copy the wing sections (where the ribs are) on paper. Then cut the ribs after that outline minus the sheeting thickness.

Now I can only hope that the wings are really different and all this was not only false alarm.


P.S.: The quick check would be putting the wings upside-down into the wing saddle. If the new wing approximately fits and the carrier wing doesn't, then the new wing's section is nearly symmetrical.