I have a Rev 2 and a Blue. I run a fair amount of pedals. I find if you keep the channel volume around 10 o'clock, then it doesn't over power the pedals as much. Anything over that, and I started to notice issues, especially with MXR stuff. I build pedal boards on the side, and have had to work around lots of amp loop send levels for sure. Rack FX are certainly better in the Uber loop, but if you keep an eye on the channel volume, you should have no problem. Is it Adlene's old green?