The mechanism works as intended.

Good design. But the connection of the parts is very weak, even in the reinforced version.

The design is good. But the thread doesn't work very well. There's no thread at the top of the model. I had to use a knife to make the threads. The parts fit together, but they're very difficult to screw on. A better solution would be to use a much larger thread pitch and twist, which would reduce friction between the parts and make assembly easier.

It's a good model. But the lock doesn't work.