@Tonedeaf. Thank you for your excellent point for me defining what I am looking for. Always good to have a place to start from. The phaser is working well. I used a set of matched FETs from guitarpcb for the build so I am hoping that they are in the ballpark. Really didn't want to get into matching.
The first thing that I would like to better (not mentioned in this topic) is removing the clipping with higher output pickups. I can alleviate this by rolling back the guitar output about 25% but I lose some tone. I am really looking for a clean, bright phased tone. I am going first to try a previously mentioned post of @Tarks of installing a 68k resistor between the emitter and base of Q7. The other option i suppose is to connect the Q7 emitter directly to the 9V source rather than the Vref. Still looking for the bias resistor value (emitter to base) for the correct voltage on the base of 4.5V.
Secondly, I would like to get the phase cycles to have a bit more "oomph" on the bottom portion of their swing. More similar to a well tuned Script 90 or Univibe. The kit I have already had a 10uF for C12 and a 4.7uF for C11. I realize these are in the dry path, but that is what is shipping in the kit now.
My thinking is that with a Vref of 5.1 instead of the current 4.1, the phase-shift circuits would perform .... uh .... "tighter?"
. Ah well, its a stab at it. Wondering if 5% tolerance caps for the 47nF in the opamp circuits would have an effect?
Thanks again.