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so I had an impulse...(squier mod)

dang!, thanks for all the positive comments!

Let me try to answer some questions...

The Dremel was hand held, I bought it in a tool-box kind of kit that has a lot of attachments. One of them is a 2" round base that fits over the front of it, to use as a platform to route into wood freehand. I'll post a pic of it later on.

The pickups... the bridge pickup is the one out of my Dean Sledgehammer. I bought a pair of Carvin Alnico pickups for the Dean. But before I did, I also bought a Rockfield pickup out of a Traben Chaos on ebay. So now I had 4 mm-style pickups. The Carvin pickups are going into the 'Hammer and now the original Dean and Rockfield pickups were left over. I actually put an ad up in the classifieds to sell these pickups, but that lasted about an hour before I came up with this idea.
Right now, the neck pickup in this Jazz is one of the Carvin pickups...it showed up at my door AFTER I gave the Dean to the Luthier (who has the Rockfield pickup...) When I get the Dean back, the Rockfield will go into this bass and the Carvin will go into the Dean as planned. [follow all that???]

For someone wanting to do this mod, it might be way easier to use the SD basslines MM pickups (5-string) because they are a basic rectangular shape without the tabs for screws.

Also the string spacing and taper angles of the strings may play an important role with pickup selection. The stock string spacing at the bridge of this bass is 18mm. The Dean is also 18mm so the bridge pickup pole pieces line up perfectly in this bass.
The Carvin pickup in the neck position is their "narrow" spaced pickup, which is I believe a 17mm. In the neck position, these pole pieces line up perfectly as well. The Rockfield pickup that will eventually find its home in the neck position of this bass is also 18mm, so the pole pieces will not look so "perfect" here. The Carvin "wide" pickup is 19mm. You can get away with the 19mm bridge and 17mm neck pickup as I'm eventually doing with the Dean. The SD basslines pickup is I think 17mm....so you kind of rally have to do some homework with pickup selection on something like this. I did all the homework for the Dean because t is a "better", more expensive and prettier bass. This one, as I mentioned, cost me $99. I don't care so much about how well the pole pieces will line up in the end, as long as they're "close enough".

I have the original pickguard, but I hate the plain white so I took it off. I was thinking about modding it to fit the pickup, but that means it'll still be white and I'll still hate it. I might paint it flat black, though or I might eventually buy a flat black pickguard and mod it to fit. I'm apprehensive about painting because the paint will scratch off from playing and it'll look cheap.
I installed the screws into the holes because I also hate having holes in the bass w/o the pickguard...Having the screws in there doesn't look as bad as empty holes.

will keep y'all posted as time goes on...
 
I took a trip to my Luthier's shop and gave him the Carvin pickup to put into my Dean, and took back the Rockfield pickup so I can put it in the Jazz bass. No more pickup swapping....for now.

here is a pic with the 18mm spaced rockfield pickup in the neck position:

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compare the pole-piece-to-string symmetry of this pickup to the 17mm spaced Carin pickup:

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the Carvin pickup looks like a cleaner installation.

...still haven't plugged in yet. If you think you're dying to find out, imagine how I must feel!!:bawl::bawl::bawl::atoz:
 
OK...sound check!

After figuring out the wiring of these pickups (somewhat...I have no real diagrams) I was able to jam out a little, that is after changing both Vol pots because I broke one, and then while pulling the knob, the shaft pulled out of the other...cheap crap!

Anyway, I also installed a couple of SPST mini toggles for coil splitting.

Both humbuckers ON:
Jeeze, this thing sound BIG. with the 250k pots, I have to roll the tone all the way on for it to sound like it does when single coils have the tone 1/2 way. It isn't muddy and isn't too bright.

Bridge humbucker solo:
Tone rolled to 3/4, sound kind of like my L2500 in passive mode with the bridge pickup solo...kind of

Neck humbucker solo:
sound like a P-bass that weighs 350lbs. It doesn't sound too bright even with tone 100% up. This is the reggae pickup.

In single coil mode, it sounds just like a jazz bass.

combinations of HS either way sound pretty interesting, no bad sounds to be heard

I wound up splitting the inner coils, because I can't seem to figure out how to split outer coils. I tried a few combinations, but they yielded a very low output signal in humbucking mode, and the same coil got split....

Maybe if I swap pickups (neck to bridge and vice versa) it will brighten up the neck humbucking mode (solo) and mellow out the bridge solo a bit, because the current setup is a Ceramic in the bridge and an Alnico in the neck. But I bet it wouldn't be too dramatic because when I swapped in an Alnico Carvin pickup in place of the Ceramic in the Dean, it seemed to give me clearer highs and more defined low mids.
but that's a project for another day....
And if I do swap the pickup positions, I will then have outer coils split...
 
Great job, I am really impressed. Pick guard idea - if you are good with the plexy make one out of that. If you want another color than black paint the inside area so it can't scratch. I saw one somwhere with the inside painted a grayish color on black bass and it looked pretty good.
 
Maybe if I swap pickups (neck to bridge and vice versa) it will brighten up the neck humbucking mode (solo) and mellow out the bridge solo a bit, because the current setup is a Ceramic in the bridge and an Alnico in the neck. But I bet it wouldn't be too dramatic because when I swapped in an Alnico Carvin pickup in place of the Ceramic in the Dean, it seemed to give me clearer highs and more defined low mids.
but that's a project for another day....
And if I do swap the pickup positions, I will then have outer coils split...

I like this. Maybe some sound samples hmmmmm? :ninja:

EDIT: I also think a really dark Tortoise or a (with more dark spots than this picture) Darker Pearl, for the pickguard would look fantabulous. Invalid Link Removed
 
Oh, btw - next time you mark the control plate position on a bass, use a wax pencil instead of a sharpie - it will come right off when you are done positioning the pickup template. :)
nail polish remover will erase sharpie marks

I had this when I in a fit of madness thought a Telestrat would be coooooool

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it was there for months and months and I decided to donate it to a kid at my church but I was like "I cant give it to this kid looking like this" used Google ..used my wife's nail polish remover
gone in 5 minutes

BTW awesome idea!!!!
 
I like this. Maybe some sound samples hmmmmm? :ninja:

EDIT: I also think a really dark Tortoise or a (with more dark spots than this picture) Darker Pearl, for the pickguard would look fantabulous. Invalid Link Removed

I quickly swapped pickups because it was eating away at me not knowing how it would sound.

I have to say...it made a DRASTIC difference.

I now know that I prefer Alnico magnets over ceramic, especially in the bridge-position.

When I had the ceramic magnet in the bridge, it sounded like...well, like the stock squier jazz sound (the stock singles are ceramic).
When I popped the Alnico in there it sounded as though I had the Duncan 67/70 pickup in that position (as I had in my previous jazz, or the Marcus Miller V pickups I had as well) and I LOVED that bridge pickup.

The Ceramic in the neck did brighten it up, more than I expected. But now, even Single coil mode, I think it sounds more P-bassy than Jazz Bassy....could be because the outer split coil is now further towards the neck than the stock single used to be????

I'll definitely have to make some clips pretty soon.

[I can't wait until my Dean is finished....]
 
some [just about] final pics of the upgrade. Will stay like this for some time I think; I'm still not decided on what I want to do for a pickguard. but control-wise, it's done.

Installed the Rckfield alnico pickup in the bridge, ceramic Dean pickup in the neck. Installed mini toggles to split coils. Wound up having to change both volume pots to CTS units because I broke one, and the shaft pulled out of the other when I pulled the knob off. The CTS pots have a larger-than-the-stock-crappy-pots shaft, so the knobs don't fit. When I go to pick up my Dean from the shop, I'll pick up a pair of standard Jazz bass knobs to make it look nicer...

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I will make some sound clips up this weekend and create an entirely new thread, since I'm sure that no one wants to see this one anymore.
 
It definitly looks better with the poles matching the string spacing.

The all black look is slick, perhaps a clear plexi guard just to protect the paint?

Use you stock one as a pattern, then mark the pup cutouts, round or bevel the edges and polish with progressively finers grits and finish up with rubbing coumpound.
Polishing the edges well makes a big impact on how good it looks.