Height-adjustable table or chair

The height-adjustable table or chair height is adjusted by turning the board. I recommend experimenting with the length and distance of the shoulders, the height parameters can change. When folding, I recommend drilling the holes for the pins, not all of them went easily.

The construction can be put together, I found out only in the end, it was a bonus for two days of intensive thinking about the design

Update, fixed pin holes in the arms

Update!!   Added stl parts of the model

Attention to the height of the layer, it can affect the thickness of the lamellae legs