If you have ditched the overflow pipe and use the Pro Bottom Malt Pipe screen then you may want to switch over to the Pro Top Screen without overflow hole.
35L BrewZilla 3.1.1 - Pro Top Screen for Malt Pipe
If you have ditched the overflow pipe and use the Pro Bottom Malt Pipe screen then you may want to switch over to the Pro Top Screen without overflow hole.
Silicone seal not required*