I do! It creates more of a clean taste and less percolator/cowboy coffee with a lot of micro fines in it, I’d recommended. The filters are like 500 for $8 I think, it’s really a one time purchase.
I mean I could be mistaken, but it looks like they just did?
Usually adding a paper filter like that will reduce the fines that make their way through the metal filters, so you get a cleaner cup. Moka is already a stronger and heartier brew, so removing some fines would likely make for a smoother cup. Also could potentially increase the pressure, even just slightly, so can grind just a hair coarser.