Depending on the footcontroller itself, you can control lots of things with it. Though i'm not familiar with the FCB1010, there are many ways to control your rig through Midi...
So ya, you can have 20 channels with your setup with dedicated effects for each channel

For example, one "channel" can be programmed to have:
a) 1 expression pedal control the R1 Triaxis' gain while the other can control for the G-Major's whammy pitch.
b) One of the CC banks can be triggered to turn on/off the delay and pitch on the G-major.
anyhow, check this
article out for understanding Midi.
Reg