Sadly, no progress since then, continued problems with getting the filament printer to work again (the second one has been broken down for even longer), my chronic repression acting up and now I'll have to move to a new apartment next month because the landlords have decided to tear down this 200+ year house instead of doing the once-in-a-generation structural renovation.
But thanks for showing continued interest!
Hope the next months will turn out better and I can finally get at least one of the filament printers to work again.