Ok this is how I have my looper setup:
on the axe-fx
cc 51 REC
cc 52 PLAY
cc 53 ONCE
cc 54 DUB
cc 55 REV
cc 56 HALF
cc 57 UNDO
cc 58 METRONOME
cc 06 external 6 looper mix
on the MIX level of the LOOPER block I have a modifier attached to external 6 (CC6) with damping on max (1000ms)
LOOPER block is always engaged. I control it with the mix. The great advantage is that stopping will make it fade out instead of a direct stop. Unfortunally starting will make it fade in.
threshold is ON.
LF+
now on the LF+ side. I give all my looper knobs red dimmed as OFF and red bright as ON, so I can visually see the looper knobs.
I don't use groups.
my IA-slots:
IA30 REC
ON: CC51 - 127
OFF: CC51 - 0
IA ON TRIG 35
IA OFF TRIG 36
(when stopping the record, play will be started (35) and metronome will be stopped (36).)
IA31 DUB
ON: CC54 - 127
OFF: CC54 - 0
IA32 UNDO
switch-type: QUICK-TAP
ON: CC57 - 127
IA33 REVERSE
ON: CC55 - 127
OFF: CC55 - 0
IA34 HALF
ON: CC56 - 127
OFF: CC56 - 0
IA35 ON/OFF
ON: CC6 - 127
OFF: CC6 - 0
IA36 METRONOME
ON: CC58 - 127
OFF: CC58 - 0
I hope this helps you a bit.