I’ve owned several Fleawatts over the years and have loved them all. I was surprised several years ago to hear Derek say that several of his friends traded in their 300B & 2a3 amps for Fleawatts and never looked back.
A few months later I was listening to a 6B4G SE amp and had a hard time distinguishing it from a Fleawatt. After that, I simply could not justify running the tube SE amp.