Most of the pieces were made in my workshop, using various tools.
Brazing of aluminum parts was quite a challenging task. I had to make a proper jig to hold the pieces in place while heating them up using a butane torch inside a ad-hoc furnace.
All metal pieces were then sandblasted and powder coated.

Prototypes work perfectly! Here are few real-life videos of the lamp: 
PLUSminus lamp was exhibited @ Milan Design Week during Salone Del Mobile in April 2018.