Okay, that's all cool to know and now to reconsider. Thanks to Lucas and johnny for that info. And thanks also johnny for mentioning the Soldano; I knew the 5150 was based off that, but I completely forgot about it in this context, since we do have all the channels of the SLO100, as well as the two rack units in the Axe. I should go explore those Soldano crunch channels now. Man, what is it about the 5150 that makes it sound so different than an SLO100? To me, the high end of a 5150 is very unique, and I haven't really heard it elsewhere. The SLO100 has too round of a high end in the lead channel for me, too cut off, if you will. And forget about the Rectifiers; I've never gelled with one. To me, the 5150 has an inherent looseness combined with a sparkly high end refinement that I love. I know a lot of people tighten up the original 5150, but to me, what's so cool about it is it's like the frequency response of metal, where even the midrange will not act like an ice pick, with the looseness of a rock amp. From the first moment I plugged in to the block letter, I felt it instantly sounded like metal, but organic, for lack of a better term, and that paradox keeps sucking me back in, as much as I learn to love other amps and OD / amp combinations.