I'm curious to try the V2 at 6v. Where would I get an unresistored contact disk? Is there some kind of washer or o-ring I can try that would fit? If someone can post the specs of such a thing that I can pick up at Lowea or Home Depot please do so.I would think the contact disk for the Protege is unresistored and would fit. Are they available for a reasonable price?TIA