Yep, you can do this with the MFC by assigning an IA to CC# 035 for Volume Incr and another IA to CC# 036 Volume Decr
From the wiki:
"If you assign the Vol Decr/Inc commands to IA switches or external switches, you may notice clicks or pops when switching presets. Solve this by configuring them to send nothing else."
Is there an easy way to use the looper with a patch, record a loop then increase the volume of the patch only & not the looping part (so that your lead is louder over a looping rhythm)?