Angry Duck, still inside my mind

This time, I am combining cmos overdrive, First stage is normal preamp buffer but using RAT negative loop, 2 stages in the 2nd section are selectable, 2.3KHz crunch overdrive or CMOS overdrive. After the 1st 3PDT switch, there is another 3PDT switch to feed signal to Ghost Dance Overdrive. Every stage ends, I put 100K trimpot, just in case of voltage overload.

On the last stage, I put contour control before preamp buffer, which originally use to drive tone control section.

But I got question in my head.. which buffer stage I have to use? FET Minibooster using J201 or just normal preamp using NE5532 or RC4558??