I set up a patch with the fx loop enabled (and amp/cab disabled) so as to run my guitar through the Firehawk and into in my Marshall DSL40C using the 4CM as described above. My hope was to use the firehawk in this scenario just like a pedalboard to get the full effects of the amps gain and distortion. The issue I seem to be having is that when using the 4CM with this patch my amps gain and volume knobs seem to be disabled. I did notice the back of the Marshall amp has an on/off button for it's fx loop. Turning the amps fx loop button off restored the gain and volume knobs but seems to have defeated the original purpose I was going for. I'm also not clear on how all of the firehawks buttons should be set - line vs stomp and output mode of line or amp. Any help or advice is greatly appreciated.