Okay, Stringstretcher, since you showed me the light, and saved me hours of choking on turkey dust, I sacrificed a couple of factory full-length feathers (AMGs) to try to solve your problem. I was successful at stripping the feathers off to the same thin membrane by heating the feathers up in front of my ceramic space heater for about 30 seconds, then starting about 1/2' from the end. I parted the feather, then started pulling gently. I ended up with the same results as if I had used a full feather starting from the tip, like I posted in the video above.
Goog