nysander

Once soldered correctl,y they are plug in compatible. https://ultimaker.com/en/community/11571-step-by-step-installation-of-silentstepstick-drivers-on-umo great, thank you very much

@ataraxis: maybe a little OT but do you have any source of information about how to setup older based on TMC2100 SSS with marlin firmware?

great example, for such setup, haven't seen this printer before. About noisy gears I think I can print gear covers to hide them and reduce noice if it will happen. Gears on the image are only for example purpose. Herringbone gears are must as you said. I think about the setup in which one motor will be geared (for the back shaft) and the second probably connected directly to the right shaft. I want to remove motors from inside of hot chamber which I will probably make some day, and hide them on the back of printer.

I am thinking about UMO direct drive solution. I've found here that prefered one is with stepper motor directly connected to the shaft (letter A on the example). But what about hiding motor on the back of UMO and connect it to the shaft directly via 2 identical gears ((letter B on the example). examples here: What are your opinions about solution B? is it good/bad etc? what are its prons / cons?