There is a somewhat related discussion involving much more expensive iglide filament here: https://www.stevesclocks.com/forum/printed-clocks/igus-filaments
I was wondering if anybody wanted to run some tests on friction of PLA vs. PETG components for the gear train? There is some very limited discussion of this online but nobody seems to know the answer: https://www.reddit.com/r/3Dprinting/comments/e8lm57/coefficient_of_friction_of_various_printed/
I just printed the Coup Perdu the frame is in wood filament with 30% walnut the gears in burgundy PETG i see no difference between the clocks I printed in PLA and PETG. Clock keeps very good time.