Some more info to add to the questions/discussion:
I competed , as a Junior, at the "5th International Model Plane contest" in Detroit. Pic is at the Plymouth Internationals (5th) , Detroit, Summer 1953.
My T shirt was the same as shown in pic., watched G. Aldrich fly and L. Andrews (RC Trixter Beam) fly
so, if my mind is still working after xx years- re the pic.
The plane, if a Zilch, is shown right side up, see triangular shaped turtle deck aft of cockpit, also shows some light colored trim aft of cockpit area which matches that shown on "removed" wing.
comment re rudder offset supports this thought.
Still cant locate lead outs or bellcrank.
And yes! Yes, there were many pretty young "girls" everywhere. :-)