The one I tried to make several times was this, it's supposedly more efficient (or something) but perhaps I'd have better luck with a normal one. Better drink this Guinness I've got sat on my shelf then!
I'll have a go at making one to compare too.
@rhb started
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The one I tried to make several times was this, it's supposedly more efficient (or something) but perhaps I'd have better luck with a normal one. Better drink this Guinness I've got sat on my shelf then!