There is only one designer in the company. For the first time, the design should be done and the structure should be done. No one to communicate is too difficult! (crying)

The design of the structure is still a little less thinking, changed for a long time, in fact, it does not meet the requirements of easy assembly.
However, this version is still more development-based and has no plans for mass production. The biggest problem is that the structure of the arm with two degrees of freedom is very unreliable.

Anyway, keep trying.