The maze 2.2 doesn't provide for adequate clamping pressure of pelts, restricts flow too much (I've seen some really promising tests of flood vs maze type blocks, and the flood types seem to do better) and it's made out of the wrong material. Silver wouldn't be practical because of the loads involved, but CuSil would be ideal (it's an alloy of copper and silver that conducts better than either and I think it's stronger than copper as a bonus-it's mad expensive though due to patents). As for the power supply issue, check out car battery chargers. Advance Auto Parts in my town sells a 5/10/20A DC supply @ 13.8V for about $40 on sale right now. They're bulky, but you can't beat the price. It will be a cleaner output than a switching supply, but not as nice as some of the fancy regulated supplies people use. Peltiers aren't picky enough to really need super-clean supplies so I don't care much.
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