I've just swapped a pair of Big Singles into a bass that already contained an active Bartolini 2-band preamp, and I've decided after some back-and-forth testing to yank the preamp and go passive. (It's a great preamp, but not for these pups in this bass.) Given that the bass already has a four-pot setup, I thought I'd go Vol/Vol/Tone/Tone. The Nordstrand folks have me straightened out on the correct pots and caps to use, but I can't find a wiring diagram anywhere for a V/V/T/T arrangement. Can anybody point me to one, or explain how to modify a standard V/T or V/V/T wiring setup appropriately? Also, if you have a better idea than V/V/T/T, I'm open to suggestions. One alternative that I've already considered is to include a series/parallel switch, but I've been advised by several folks that this probably isn't a good idea with the Big Singles, because (a) Nordstrand wires them somewhat differently for serial vs. parallel applications, and the set I have is designed for parallel, and (b) these things already sound so huge in parallel that serial wiring would probably cause a tear in the space-time continuum. Any other thoughts?