Hi there, A couple of weeks ago I bought a Pro Co RAT II. I used it with the supplied battery, but that one has died now. I wanted a power adaptor for this footpedal, but the powersupplies from footswitch manufacturers (spelling?) are very overpriced (i.e. Boss, ...). So today I bought a universal power supply with different, switchable input jacks as well as a switch for changing the output voltage. Anyways, the RAT has a jack-input. Now, with boss pedals I know the polarity of the plugs (+ on the outside, - on the inside.). But how's the polarity on jack-plugs for a RAT?