I'm using a Line 6 Relay G90 wireless, Helix Rack, Gibson Les Paul Axcess, through the band's front of house PA system, plus monitors. The wireless system is currently plugged into the Helix return 1 to save putting a lead round to the from back of the flight case to the front where the Helix guitar input is located. Due to some very cutting/harsh treble sounds, I'm now using the cable length setting at about 80-90ft on the wireless. I also note that I get a much better guitar sound not using the wireless system (using a standard cable) and using the guitar input on the front of the Helix. Am I missing something obvious to get the Relay G90 working better with the Helix rack system? Now I know there are plenty ways I can vary the Helix set-up, but I'm more interested in getting my source sound sorted, otherwise no amount of Helix tweaking will improve the overall sound. Are there any tricks, tips, hints, etc for G90/Helix use. Any help appreciated. Thanks, Peter.