Added Nevermore chamber fan/filter

[Lion]

I guess having extra filtration couldn’t hurt.

I added this…

HEPA Filters are a bit more important than I thought they were

I designed a filter addon for the Zero but I only had anecdotal evidence that the smell of ASA was all but gone with the filter on the printer, turns out the filter is catching quite a lit of particles! Filter on the left is a new clean filter, filter on the right has been on the printer for 4 or 5 days, it was printing mostly grey/black till today when I loaded up red ASA, the colour of the filter speaks for itself… this is only after 2-3 hours, maybe 150-200 grams and yes, the exhaust block o…