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Chronoisseur
I have a fine screen from the PV variety pack that stays secure just above the ridge, and also use the stock sub screen on top which dumps with each bowl as it is a bit looser. I'm finding this to be a good combo, with the thick stock screen helping the dump (and thermal equilibrium?) and the fine screen keeping my sublimate smooth and clear. Before wedging the fine screen in below, the sublimate had a bit more texture to it, and I often found the odd bit of ABV.