A small update:

- the pinion gear eventually came out by punching the bearing out, slowly and carefully, from the opposite side
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- here is the gear/bearing that came out - this is all obsolete now
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- now the Z-axis looks mean and lean (LEFT: BEFORE, RIGHT AFTER)
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- Now, I have bought a pile of these sort of building materials, and plenty of short 5mm bolts/nuts
-- They are made from galvanized iron, (or the more expensive ones, are stainless steel, very rigid)
-- Aim to attach bearing mounts to structures made from these building materials
-- This is cheap, but thought would make a running mock up with them.
-- Hope that way one could run the machine a bit, check dimensions again, check where to improve --> then make rigid, nice looking parts from aluminium.

Maybe this ugly duckling will turn to a beautiful swan some day.

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