With all these great micro builds going on here, I couldn't resist it anymore Like the rest of us I have of course been looking at the designs by @robrob I began to plan a "high power" Twin, essentially the Bassman but with two pairs of output tubes, with half the 12AY7 as a switchable extra gain stage. Then I started thinking a 4 triode output stage kind of defeats the purpose of a "micro", and started rethinking it. I ended up with 5F6A/RobRob's circuit as the basic clean foundation, instead adding an overdrive channel that is sort of inspired by a Dumble ODS and also a design by Kevin O'Connor. The overdrive channel will most likely be tweaked when I get sound out of it, so this is more like a starting point. I put a switchable Framus mid control in there as well, I liked it in a previous build. I had already ordered a pre-drilled Marshall 18W chassis with five tubes. Haven't got it yet, I guess it might be a bit of a challenge to find room for the circuit, knobs and switches. The pre PI master and the presence control are left out for this reason. It's kind of Dumble, Bassman and it is little, so...a Lil' Bumble-B Anyway, here is the first draft for it. Grateful for any input, opinions, suggestions etc!