Amazing work, took some time to print all the parts perfectly. Took me almost two afternoons drilling out all the holes and assembling everything. I used the the same axis with a slanted cut on a high speed drill, to drill out the holes very precisely so they don't have much play. Got the tourbillon working and most of the gears but when fully assembled it won't work unfortunately. There seems too much friction somewhere for it to work. I did learn a lot making this though! Hats of to the designer, it's a piece of art!