Gooooooooooood morning pedal heads! The obvious answer is "Try it and see". I get that. I'm not running a pedal board in my current band. I just don't need it. (I'm working on landing a few songs in the set that will allow me to bring out more toys. but for now....) However, we're getting ready to add "Sledgehammer" to the list. It's a great excuse to whip out my fretless live for a few songs anyway. But I can't imagine playing that song without the octaver. Rather than running the pedal in front and setting it on the floor, I'm considering just setting the pedal behind my amp head and just reaching back there and engaging it for that one song via the effects loop. If it matters, the bass is a G&L L2000 fretless, head is a Mesa TT800 (two effects loops...one for each channel...I'll be using the Subway channel for this), and octaver is an Aguilar Octamizer. Are there any downsides to running an octaver in the effects loop?