-
Haven't bothered with one, but figured the frustration in taking one out of the portafilter would be much more annoying that my metal aeropress filter (which can peel off the puck easily).
Not sure if it's worth trying a paper aeropress filter to see if it helps your setup much before buying one (or maybe a better shower screen? Not sure if they're equivalent upgrades as I'm not very knowledgeable about puck screens to be honest!)
Does anyone use a puck screen in their espresso setup?