Hi

So my next project will be a 51 p bass with some mods as follows:

Alder body from a blank
Maple fretboard neck 21 frets and 38mm jazz nut width
Wilkinson bridge and tuners
DiMarzio dp120 (model one) for neck pup
Seymour Duncan scpb quarter pounder for bridge (or p-position actually)

Classic styled or slightly modified control plate depending on what mods I plan to put in.

I was thinking of one volume and one tone knobs plus some kind of selector switch between them. Now my problem is deciding on what type of switch and selection to use. I know I want to be able to isolate just the sc and the humbucker by themselves - the DiMarzio in series to get fattest sound out of it. Keeping the system passive.

Now for the gurus like Weirdbits who have helped me tremendously with my previous build:

What would be in your opinion the best solution to get the pure isolated sound from both by themselves and yet find the best common wiring to work both pickups at the same time for versatility? 3-way switch or maybe even 5-way? Classic tele-type switch could easily be placed under the plastic pickguard or the modified steel control plate (havent designed it yet).

Challenges are the 21 fret neck which places both pickups slightly more towards the bridge than original 20 fret neck (this will also slightly change the appearance of the bass compared to original) maybe 1-2cm total. Also because the DM is wide I'll have to move the SD about 1cm closer to bridge to safely route the cavity apart from DM. These will also affect the tone of course. I could cut the overlapping part of the fretboard at the end to shorten the neck some but it could look somewhat odd... I'll think about it after I get the neck and take a look at it.

Some suggestions on what pots, caps etc to use and even diagrams would be much appreciated.

I will post on the Non PBG build thread after I get this thing planned and started.