I've owned this amp for almost a week now, and I'm still somewhat learning it. For the past week I've been using "M" on the red channel for my leads, but today I switched it to "T" and am quite enjoying it. "L" seems a little bit overkill, but I don't think my oversized Mesa cab is helping with that? Where are you guys running the excursion and why? I've not really moved the Blue (which is fabulous, by the way) excursion from "T" as I like it best there, but as I say, I'm still learning the amp as we speak.