I wondered when I saw the picture how it looked like it had simply landed on an airfield. I think maybe they knew one had gone down and decided to make the most of it. Alternatively they got the thing but the wreckage would not be identifiable in a picture so they made their own. A fellow I work with makes exquisite model planes out of foam dinner plates and such that are near perfect scale models. It doesn’t take him a terribly long to do it. On some he works from pictures and finds out the measurements later but already has them right. He is a not bright person and I wish he could figure out how to sell that talent.
There was no time to make a model after the crash.
The putty/tape is VERY easy to explain.
They cut the wings off to quickly transport it by truck and whisk it away from the landing site before we got smart and tried to locate and destroy it.
That’s HOW you move an aircraft fast, you take the wings off by any means necessary. It has no rivets or aluminum weld lines which means it is made of a modern composite. It’s easy to just saw through it. I have a lot of experience with fiberglass and carbon fiber aircraft.