I have a modulus bass with three pickups. The arrangement originally was simply three toggle switches: one for each pickup. My G&L also uses a lot of mini toggle switches but they allow not only the switching of pickups but also the ability to place them in series or parallel. I like that feature. A recent thread was about a switching kit (for a three pickup Strat) that allowed 35 different "tones" by having switches for series or parallel and for phase. That got me thinking. I really didn't want my final three pickup switch to be any different from the three switches on there originally. But I did really want something a bit more advanced than the series parallel of the "patented" tone switch. What I wanted was to still have three switches (I think the phase switches are unnecessary as out of phase pickups don't sound so hot anyway) And then for each pickup I wanted a choice of series or parallel or off. The attached information gives the ultimate switching diagram. I even give you part numbers of the switches you need to buy. It's expandable to any number of pickups or down-gradable to two pickups. I have built it into my Modulus and I LOVE this thing! it goes all the way from the super dark thump of all three pickups in series to the thin bright tone of a single bridge pickup. No need to ponder a schematic diagram as I've included a wiring diagram as well. Note that these switches are SPECIAL. And not cheap (Like $20 each!) But they are available from mouser.com. I haven't quite figured out what to do with my G&L yet as on that one I'd like single coil options as well, but I am going to try this switching method on one of my strats next. I'll say this. It sure is a HUGE improvement over the simply on-off parallel wiring my bass had originally. Putting a series option on my SX really convinced me of the utility of series/parallel switches. And if you do want phase switches just for fun, I included that circuit and wiring diagram in there too. Check it out! Oh, and by the way. Since it takes at least two pickups to be wired in series, some of the switch settings (those with only one pickup on for example) are identical. For example a single pickup set to series is the same as the same pickup set to parallel. However TWO pickups set to series are NOT the same as two set to parallel. You still can count up 12 different tones without the phase switches. With the phase switches three pickups will give 47 "tones".