Answer to both questions is YES.
1) the CTL pedal functions under Pedal/Fx will be used for LED function only, set to "led toggle", and i think there is also a setting where the led status can be flipped to one half of the CTL toggle cycle or the other.
2) use 4 assigns, all with Source mode set to toggle, 2 with CTL 1 as the Source, other 2 with CTL 2 as the source.
Then for the CTL 1 assigns, one Target se to FX1 on/off, the other Target set to Chorus on/off.
For the CTL 2 assigns, set one Target to FX2 on/off, the other Target to Chorus on/off.
With all the assigns, check that the Assign is "enabled" too.
now quickly press the Write button twice to save the settings.
Might be a good idea to check theat the pedal functions in the System menu are set to Patch, or the pedal functions could be globally over-ridden there.
1) the CTL pedal functions under Pedal/Fx will be used for LED function only, set to "led toggle", and i think there is also a setting where the led status can be flipped to one half of the CTL toggle cycle or the other.
2) use 4 assigns, all with Source mode set to toggle, 2 with CTL 1 as the Source, other 2 with CTL 2 as the source.
Then for the CTL 1 assigns, one Target se to FX1 on/off, the other Target set to Chorus on/off.
For the CTL 2 assigns, set one Target to FX2 on/off, the other Target to Chorus on/off.
With all the assigns, check that the Assign is "enabled" too.
now quickly press the Write button twice to save the settings.
Might be a good idea to check theat the pedal functions in the System menu are set to Patch, or the pedal functions could be globally over-ridden there.


