Those are beautiful! Could you make money selling them?
A question - there seems to be a lot more to this height adjustment than is obvious. What are the details?
The iron red one is one of the 100 customized ones I found in the factory, and the thread is very poor, and the concentricity is also very poor, which makes me lose confidence. So I had to make my own screws and nuts. Then use standard mechanical screws to lock.
So I had to make my own screws and nuts. Then use standard mechanical screws to lock.