The instrument literally fell apart on day zero. It was a fun project to put it back together, make it more solid, and do some personalization (just for the fun of it) on the way, but it looks like - out of the box - it wouldn't stand a single song.
On the design - the top panel would loosen the screw, and the rings fall off. The inner piece of wood is too soft, and tightening the screw too much would make the inner bolt wear it off.
The bottom panel also feels loose. It would be great to see the panels have carved guides for the metal cylinder so it can all be more firm.