Thanks, Adrian, that is incredibly helpful! My Vostok doesn’t have the safety system, so maybe I can still lube the lower pistons without removing the screws?
Anyway, I just ordered Molykote 111 and will plan to look at this in about 6 months. I do think the machine can benefit from lubing the joysticks immediately, because they are surprisingly tight from the factory.
After further research, there is an “ACS Espresso Official” channel on YouTube where they’ve started posting some maintenance videos, like how to backflush the lever and how to take apart the lever. I hope they continue posting more videos for owners.