I cannot take credit for it, but here's what it looks like along side my big racking cane, I just finished this one a few days ago, the old one was perforated vinyl siding. Mine is a 4" pipe, the holes are 7/64", and as @boatboy24 estimated, there are a gajillion holes to be drilled. The skins will cover and block the holes, but a slight spin of the tube while you're racking keeps it pretty clear. It keeps up fine with the autosiphon, but a vacuum racking setup is a little harder to keep up with.
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