For a long time we have had tape over it, but that has to be removed if ever there is a paper jam, and tends to come undone anyway, it is a pain.
Now I have a 3D printer... So a bit of work on openscad.
|Original (broken) on left, new one on right.|
Update: I will find my micrometer, but I bet the metal rod was not 6mm but was 1/4", which explains why I had to make the hole larger, eventually 6.4mm (1/4" is 6.35mm). So sounds like the printing is in fact spot on.