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Anybody using the 7 cable method? I set 7C method up using a new Marshall DSL40CR and an older Marshall DSL40C. I want distortion/overdrive going in front of amp and modulation effects after preamp in DSL40 FX loop. Sound is cutting out substantially on newer DSL40CR. Older DSL40C working fine. Cable #1 Guitar=> Helix LT Guitar Input Cable #2 Helix LT Send #1=> Amp#1 Main Input Cable #3 Amp#1 FX Loop Send => Helix LT Return #1 Cable #4 Helix LT 1/4 Left Output => Amp#1 FX Loop Return Cable #5 Helix LT Send #2 => Amp#2 Main Input Cable #6 Amp#2 FX Loop Send => Helix LT Return #2 Cable #7 Helix LT 1/4 Right Output => Amp#2 FX Loop Return Copied 7 Cable Method patch from template. Signal Path A going to Amp#1 panned left 100%. Signal Path B going to Amp#2 panned right 100%. FX Loop block mix set to 100%. Global Settings Send/Return #1 set to instrument, Send/Return #2 set to instrument, 1/4 outputs set to Line. Signal Path A panned left to Amp#1 is working fine (older DSL40C). Signal Path B panned right to Amp#2 has signal (volume) loss in the effects loop. Signal Path A output turns green indicating signal is going out. Signal Path B output does not turn green, although I have sound. If I turn FX Loop off on Amp#2 sound increases to normal. Since Amp#1 is working fine I switched all the cables between Helix LT and Amp#1 and Amp#2. Amp#1 continues to work properly while Amp#2 continues to have sound loss. I swapped out with other cables I know are good so I am sure it is not a problem with cables. I disconnected from Helix LT and jumped a cable between send and receive on the Amp#2 FX Loop. Sound volume level remained the same with FX Loop on and off. I also ran a pedal in the FX loop and had no sound loss. I took Amp#2 to a skilled Amp technician. The guy builds his own Amps so I know he is qualified and competent. He cleaned Amp#2 FX Loop jacks. Checked everything and finds no problem. Are there any other settings in the patch set up or global settings I need to consider? I am sure it has something to do with the signal interfacing between Amp#2 and Helix LT. I found this on a Marshall Forum "some effects loops have a problem when an effected signal is mixed with an out of phase dry signal at the return point". I called Marshall USA and actually spoke to a technician. The Marshall tech used to own a Helix so he completely understood my issues. He said if my effects loop is workimg fine with jumping and with a separate pedal there is no problem with the amp. Its still under warranty but I have to ship it to Mississippi for them to look at it. Anyone have any ideas?