That was a really tricky challenge.
The HD34 was a really interesting aerodynamic oddity, but more a solution looking for a problem - two wing struts each side, each the area of a large light plane wing, etc., etc. Difficult to find a hangar large enough and I cannot imagine how slow and ponderous it must have been to fly!
OK, here's another aerodynamic challenge and an oddity which may, or may not go quickly:
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