Did you see this / have your glasses on

Eric, yes, that is amazing, only 1.5" (38mm) wingspan Fokker Triplane, controls rudder and electric motor control. Definitely an indoor flyer, easily lost if flown outside, plus winds, even a light breeze would be merciless.

I posted the video you found on RC Universe, Over 50's thread. That sparked my interest, so found another video a bit more practical at our level, a 4" (100mm) wingspan profile WW2 Zero electric RC in a new thread. Builder used a heated wire cutter, made foam sheets out of scrap packing Styrofoam, shows micro actuator for elevator, rather clever.

With the shortages of balsa, posting of K-Flex airfoils, I'm thinking that foam is the new balsa.

Thanks for posting that video, one would never thunk one could go so small with RC.