Morning Ken. How's the day shaping?
Actually mate, my next clue, was to be aimed at Trevor as he seems to be the best(?) at those Aerofiles code things...
Which would probably have led him to Hollmann..
Hollman
Winther-Hollman Aircraft Inc, Cupertino CA. Condor 1982 = 2pCmwM; 65hp VW or 115hp Avco-Lycoming.
But ADI googles the same photo...so your control mate. Well done.