Depends on the beer and your taste as to what temp to set it at. With the unit set to it's lowest setting, 36deg, you'll get 31-33 deg beer. For me I like this with Mic lite. With a non lite lager (mic or labatts) I set the temp to 37, gives me 34-35 deg beer. Note it's not a linear change. Other beers may / will have their own temp / pressure requirments. As for extra tower insulation I wrapped a couple layers of foam floor underlayment, it's thin, over top of the existing foam.
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