I have two pandas, one for biomass after ethanol extraction that uses a 200 micron bag, none of the bags are closed off at the top its just a cyilnder with one side closed off at the bottom.
On the filtering one, Alcohol does start to spray out the top if u pour the alcohol against the top inside of the basket. I pour so it lands on the middle about 1/2 way between the middle and edge and it doesnt seem to be an issue for me.
The powders will go through the first couple of bags but doesnt go past the 0.5 micron much that i can tell. Just mix the powder in with ur first wash and it will be spread evenly when u do ur first filtering. Havent done side by sides on the same batch yet to see if it does anything, i dont think its gonna do anything crazy cuz my ethanol is around -60C when im filtering and the resinonce time is very very short. Im trying a mix of AC, T5 Clay and cheap fryer magsil powder. 1:5:5 ratio for the powders and about 1:20 ratio of powder to initial ethanol soak.
I ordered the same felt that is listed above from dudadiesel, they have all the size u need. I got 1 yard x 72" of each and had enough to make 4 for each size with alittle extra left over. The dimensions of the cylinder is 9.5" diameter x 13" length. Which is about 31" x 13" rectangles and 10" circle to account for the stitching area. My aunt did the stitching for me and used a sowing machine, the 0.5 micron was the only difficult one for her because its slightly slippery from the ptfe coating
Traded her vape carts for stitching time👌