I did a similar thing with my bucket fermenters for my last few NEIPA brews. Going to try this with my first go with the all rounder. This is the best way to go by far than all these crazy setups and chances to oxidize goes way up. Best part is no mess and no stress.
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I'm interested in doing this too. Trying to guess volumes with the malt pipe is driving me nuts.
I see they have this one. Maybe combine that with the extended bulkheads?
Weldless Flex Sightglass (brewhardware.com)