Paper towel element for a Goldenrod oil filter

A pre-filter for a Goldenrod Water-Block filter for my Harvest Right freeze dryer. Using discs of paper towel, this blocks most of the particles and some of the water before it get to the Water-Block filter.
I made the first one with flex plastic for both the top and bottom grids; the top grid flexed too much so I reprinted it using ABS.

I plan to redesign this with a threaded center tube instead of the cut-from-an-old-filter threaded section I used on this one.

https://youtu.be/diLdZ02vaCY