After experimenting with my RG-7-CST some, I've come up with MORE options if you go with the
KJG Wiring Modification. Here's the "wiring breakdown" with regard to button position:
-----------------------------------------------------------------------------
BUTTON UP:
•3-way Toggle Controls:
Pos. 1- Mag. only with 5-way
("Extra" knob used for tone control).
Pos. 2(center)- Both Mag. and Piezo combined.
(5-way still functions & tone for Mag. is still the "Extra" knob)
Pos. 3- Piezo only.
(No 5-way; no tone)
•Volume: Mag. volume only.
(works independently)
•Tone: Piezo volume only.
(works independently)
•"Extra" Knob: Tone for Mag. only.
•Output A: Mag.
•Output B: Piezo.
Cable Suggestion: (2) mono cables, or a Y-cable into a stereo cable (then a splitter at the other end). This will give you two completely independent signals. A single stereo cable will NOT work without a Y-adapter/splitter from the guitar.
-----------------------------------------------------------------------------
BUTTON DOWN:
•3-way Toggle Controls:
Pos 1- Mag. with 5-way; normal tone control positon.
Pos 2(center)- Mag. with 5-way & Piezo.
(Tone knob is used for "panning" between Mag. and Piezo. "Extra" knob used for tone control of Mag.)
Pos 3- Piezo only.
(No 5-way. No tone)
•Volume: Mag. volume for Pos. 1 & 2; Piezo volume when in Pos. 3.
•Tone: "pan" between Mag. & Piezo- Pos. 2 only.
•"Extra" Knob: Tone for Pos. 1.
•Output A: Mag. & Piezo
(via one cable; always separate signals for Mag. and Piezo)
•Output B: Not used.
Cable Suggestion: (1) mono cable. This offers only one signal.
-----------------------------------------------------------------------------
-Thanks to Todd Crawford for his help with this project and alternate testing.
EDIT- font size repair.