Made some changes.
The dual switch is gone. I'm now using a 2nd exp.pedal (EV-5) to control the output volume, and for solo boosts.
I replaced the large Mission pedal with a smaller Dunlop Mini pedal.
The three FM3 switches still change
AMP channels, with switch 3 toggling between channel C and D.
Switch 1 HOLD changes the FC-6 to a
Presets layout (4 presets with Bank Up/Down).
Switch 2 HOLD changes the FC-6 to a
Scenes layout (6 scenes).
Switch 3 HOLD engages the
Tuner.
I applied a trick to the Presets and Scenes layouts...
Tapping a preset/scene switch will select a preset/scene and return the FC-6 to the previous Effects layout.
Holding a preset/scene switch will select a preset/scene but NOT switch layouts (staying in the Presets or Scenes layout). Similar to the "sticky" feature of the AX8 and FX8.
My clean sound is now the Two-Stone model. Still using the Ecstasy for dirty sounds.
I created a new custom IR mix which I love with everything, from clean to high gain, and which also sounds excellent through floor monitors.
I have a range of presets using other favorite amp models, using exactly the same grid each time, plus one for my acoustic guitars. Attached, with my FM3/FC layouts. Make sure to select a cab in the Cab block.