Beautiful build - using your WIP as reference for my own build. Amazingly well engineered kit and with so many microscopic parts - I admire your patience!!!
Awhile back a post (4 Fed 2018, by Phartycr0c ) in this thread caught my eye - "great build work on a really unusual subject. does make you wonder whether Kayman "Appropriated" the captured German technology for its line of helicopters etc."
The connection is more direct than "appropriation" - a quote from Wikipedia:
Design and development [of the Huskie HH-43]
In 1947 Anton Flettner, a German aviation engineer, was brought to New York in the United States as part of Operation Paperclip. He was the developer of Germany's Flettner Fl 282 "Kolibri" (Hummingbird), a helicopter employing the "synchropter" principle of intermeshing rotors, a unique design principle that dispenses with the need for a tail rotor. Flettner settled in the United States and became the chief designer of the Kaman company, where he started to design new helicopters, using the synchropter principle.
The Huskie had an unusual intermeshing contra-rotating twin-rotor arrangement with control effected by servo-flaps. The first prototype flew in 1947 and was adopted by the U.S. Navy with a piston engine. In 1954, in an experiment by Kaman and the U.S. Navy, one HTK-1 was modified and flew with its piston engine replaced by two turbine engines, becoming the world's first twin-turbine helicopter. The Air Force later adopted a version with one turboshaft engine: HH-43B and F versions.
Italeri/Testors makes the Huskie and provides internally a pair of beveled gears that allows one to study the coordination of the counter-rotating blades – a ‘must have’ companion to the ‘Kolibri’ – no?