I typically run one amp block panned hard left and one amp block panned hard right with the same settings to avoid summing to mono in most of my presets. I typically use one cab block, running the new dyna-cabs, with input set to stereo and using the same cab across all four slots. I set the left and right slots hard panned left and right with the same settings, usually a dynamic 2 and ribbon on each side. I have noticed, on occasion, some big level differences between the left and right channel here and there and found it to be the "Auto Dyna-Cab Imp." setting in the amp blocks. When I come across this issue, and it is not due to a differing setting, I found a process that seems to resolve it. On each amp block ... turn off the "Auto Dyna-Cab Imp." setting, select a different SIC, select the "proper" one, then turn on the "Auto Dyna-Cab Imp." setting. I thought I was going crazy, so just thought I would share in case it could help someone else.