@Richard: I've tried that with the MP-2, and it's not the same as the CT. I didn't much care for the way that works. By using the volume pedal on the input with a dynamic amp, the amp will clean up as you back the volume off. The MP-2 isn't that dynamic in that sense.
With the CT, it is more dynamic that way, but I have to use an external volume pedal. The volume pedal on the Fender controller is not assignable, the other pedal is, but as far as volume, it's only assignable to the master once again. I usually assign the CC pedal for modulation speed control with the vibe programs, and delay time, or feedback control with one of the delay programs. Time control with the digital panning delays actually controls the speed of the delays panning. Feedback I use with one of the Tape delay programs which can send the delay into feedback oscillation, and back it down again. Pretty cool.
@MJMP: Is the Gmaj. in the effects loop or inline between the preamp and power amp? I've never used one of those, but I have a pretty good idea that it would produce a different dynamic response than just manipulating the master output of the preamp itself. I've done something similar with the Lexicon LXP-15 II, and it did have a different dynamic to it. By the way, from what I'm hearing with the volume control on the pedalboard, it seems to control the output of the power amp as opposed to the output of the preamp.
As far as the CT, yes there is a compressor, the same with the CD as well. I'm not sure what the codecs are, but as far as the loop goes, I'm not impressed with it. The loop seems to be the same as plugging into the input. Then again, with the built in effects, the loop isn't something I have a pressing need for in these amps. With the CT, all I need to do for stereo wide separation, is plug the line outs into my old tube Twins and set those apart to either side of the CT. That's a great tone there. With the CD, I use the old Vibrolux Reverb from the expansion output and get the same thing, but with no center amp.
Harley