Thanks folk - that is good to know. Folks on CN also warned me that a device that can't supply enough current could cause the voltage to go over or under. Bintel said under voltage is more serious than over voltage with ZWO cameras.
Given I have a a spare Lab power supply in the AstroLab already - I think I will just set its voltage to 12V and let just let supply all the ZWO cooled cameras I plan to get whatever current they need. That means I just need the adapters to hook the 12V plugs out of the Lab to the central pin in on the ZWOs! Jaycar should be able to provide something!
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