Swets,
Thanks for the reply. I may try one of these as well. What size is the plexiglass? I may use a fluorescent light safety tube. They are about 1.5" or 38mm. (Did you make the helix of the plexiglass material) or is part of another bottle? )(Edit: I see that now) I think I could cut a bottle and unroll it and cut the helix from that, or buy a sheet of polycarbonate or PETG material.
You could connect a filter just to the exhaust side of the vacuum pump just to catch the fines that may still be in the air. |