Scott's GED-enBacker RC-4 Build

[geddyfan]

3 volumes and 1 tone with no switches means there are four pots constantly in the circuit, regardless of which pickup(s) is/are turned up or on. This can cause the loss of some treble/highs to ground through the pots. Also, it affects the loading on the pickups which potentially changes how they sound compared to what you expect. Additionally, to mute the bass you'll need to turn down all non-zero volumes, which will be a pain if all three are up. Just my thoughts.

The two toggle switches would work like this:
Toggle switch 1 selects between bridge/bridge + neck/neck
Toggle switch 2 selects between middle/middle + toggle switch 1/toggle switch 1

So, the layout would basically be:
bridge pickup -> push/pull volume -> toggle switch 1 in A
neck pickup -> push/pull volume -> toggle switch 1 in B
toggle switch 1 out -> toggle switch 2 in A
middle pickup -> push/pull volume -> toggle switch 2 in B
toggle switch 2 out -> master tone -> output jack

(if you can understand my awkward explanation)

Yeah...I actually figured that's what you were going to say...imagine it would humm like crazy, too...

I think you're right on the money...what about rotary switches? Then I could use the same black dome knobs I got for the pots to unify the "look"

Six knobs on a Fakenbacker...that might actually be suitably manly-man for this bass...

Might have to make the control cavity bigger...

[WeirdBits]

...what about rotary switches?

A 6 position rotary switch (the largest available that I've seen) will give you all but one of the seven possible parallel combinations of the three pickups. Which combo you leave out would be your choice, typically either the 'all 3 on' or the 'bridge + neck' combo if you were wiring a Strat style build.

If you use two rotary switches, particulalry the 4-pole type, your possible combinations and options expand significantly. Then you have to decide what combo's you actually want (or are likely to use) and we can start working out how the switches can be wired to achieve that. As Simon mentioned earlier pickup combinations plus parallel, series, phase options etc.