[quote name='MiltyG565' timestamp='1359600866' post='1957454']
To me, it would have to be single coil pickups. I find the difference between a humbucker and a single coil is that fatness you describe, but also more pronounced highs, which you obviously don't want. As far as winds a materials go, i'm not entirely sure. More winds gives a pickup more response, so maybe a pickup with slightly less winds than average is what you want? I wouldn't know what sort of copper winding you would use though, early fender pickups used one called heavy formvar, but if you are going down the single coil route, at this point, you might as well get a couple of reissue pickups made.
Unless both coils on a humbucker had less winds than usual, it might give it less response in the high range and maintain the fatness of it... it's worth a chat with an expert on it.
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Just goes to show how differently people can perceive things.
I would describe single coils to be thin and with pronounced highs and humbuckers to be fat and with pronounced lows [with a huge amount of small print to be added at the bottom of the post as it is never so black and white]; ie the polar opposite of what you said!