I’m going to order the stuff for a new amp build today, and I’m torn between two options. The point of this amp is to not only be an amp, but also a test bed for mods and learning. And I’ll be building the cabinet and intend to get creative with that as well, artistically, and perhaps trying to figure out some sort of, “quick draw” design for quickly accessing everything for tinkering. Option one is the 5F2A, a nice, comfortable option, like a friendly yellow lab. But I feel that single-ended would only go so far as a platform for ongoing experimentation. The other option is a 5E3. It’s like looking at a German Shepherd over a fence, for me. It might be friendly, but maybe not. But I think push-pull would lend itself to far more possibilities when experimenting, and learning. This amp will not have a peaceful life, if things go as I envision. It will be tinkered with often. But when not under the knife, I’d like it to remain portable and somewhere near normal looking. I’m only a half mile or so down the road from ignoramus when it comes to building tube amps. Should I stay in comfortable territory and build more complex circuits when I’ve milked the 5F2A for all it’s worth? Or shall I jump over the fence and try to pet the German Shepherd? The 5E3 seems like it would offer more potential for modding and learning. But I don’t want to get bit, LOL! Thanks for your thoughts!