So: I received the Phat Cat last week and did the wiring.
In order to have to not route the body too much and to have the PC holding stronger in place, I unscrewed the pole pieces so the enter the pup cover holes. I had the file those holes a bit too to make them fit..
I routed the JM body too...

My first plan was to keep the PC as it is but when I installed it I still had to snap the mounting tabs off.
The wiring is a little special.
There are 2 3 pos switch:
- 1 is the trad pup selector. I put it in place of the volume pot.
- The other one is a on-on-on 3 pos switch and it selects the output of the pup selector to go to the volume pot OR Direct to the output OR to a 0.001 cap then to output
There's only a vol pot.
I kept the piezo but replace the 1meg volume pot by a 1 meg resistor.
I changed the kill switch for a bigger one.
it looks like this inside:
The Neubauten sticker didn't survive the mods: it went half off when I removed the guard (it was a very bad quality sticker). I removed it but it left a huge amount of glue on the guard: I tried every thing to clean it but nothing worked ! So I cobered it with gaffer tape.
All was ready, I was just waiting for the AVRI pup and installed it as soon as I found it in the mail box yesterday.
I played it and the results are kind of odd.
I read everywhere the AVRI pup are on the harsh side but it's darker than my novak neck on the OTM Jazzmaster..

... Maybe that's because I didn't put a treble bleed mod in this guitar.. I'll put one and see.
Otherwise this AVRI pup is sounding nice, The Phat Cat too... both are a little bit too much on the dark side to me but not too much..
The middle position is way too thin sounding.. I suspect the pups to be out of phase... Will it make a difference if I physically reverse the AVRI pup ??
All position on the On-On-On switch works but the cap is too big: the sound is good on the PC but too thin on the AVRI.
I can't hear no difference between the direct sound and the pot sounds when the pot is at max.. which is kind of weird..
Oh and here is how it looks now:

Once you're lost in twilights's blue, you don't find your way. The way finds you...