I'm not sure if any of my projects are ever really "done" and I don't have a cabinet yet, but my 2 Channel Micro Reverb is done to the point of being a very playable and nice sounding amp. This project started from Rob Robinette's 1-watt micro RR763 - then added a second channel, and an EL84 driven reverb mostly stolen from the Vibro King. All the tubes are Soviet era military tubes because I had a bunch lying around. And I've decided now I quite like them. They go smoothly into overdrive and produce pleasant musical-sounding distortion (to my ear at least). Schematic and Layouts way down at the bottom. Observations 1) Channel 1 does sound quite Blackface-ish with the raw/mid knob all the way down and the push-pull bias switch on the "clean" position. 2) Turn up the Channel 1 raw/mid knob and it starts getting tweed-y, louder, and a lot more breakup. This gets interesting tones up to about halfway and then becomes too much of whatever it's doing. 3) Put the Channel 1 push-pull bias on the cold bias position and it starts to sound like a high gain Marshall. This is when you really need the "tight" switch because otherwise the bottom end starts to get too thick. 4) Channel 2 is mildly disappointing. I love the Pentode channel on my Trinity TC-15 and this is basically a copy, but it's a lot more chimey and magical paired with the Vox-ish output stage. It does do some nice high gain sounds but the clean sounds are kind of "meh." 5) The reverb is really nice. It can go very lush or very subtle. I usually struggle to make reverb work with high gain sounds but for whatever reason this reverb plays nice dirty or clean. 6) I did all the "voicing" and tone mods with guitars I built - which all have single coil pickups and all of them more toward the vintage-y end of the spectrum than high output SCs. I get some nice rich clean sounds and some really robust high gain sounds that would almost make you doubt you're playing a single coil guitar. All three Strat pickups sound just lovely with this thing, from clean to max saturation. My one guitar with humbuckers is an Ibanez ES335 knockoff with Duncan Seth Lover pickups. This amp and the Seth Lovers do not combine for any clean tones at all. It starts at "crunch" and goes up to face-melting distortion and it's too fat and thick everywhere. I'm kind of a single coil guy anyway, so I don't particularly mind this. But if anyone who likes humbuckers were to try to build something like this you will want to voice it very differently. 7) The "tight" switch is super useful to prevent high gain sounds from getting too thick/muddy. 8) I am playing this through a 2x12 cabinet right now because that's all I have - it's got a Weber 12F150 which is a very Blackface-y sounding speaker and a Celestion G12H30. If I could do anything with a speaker change for this amp, I would want to tighten up the low end. It has a bit of a tendency to go "boom-y" - not bad, but if I could tweak something with a speaker change that would be it. My idea is to make it a 2x10 cabinet - and ask CJ at Weber what to speakers to put in to keep the "boom" tamed. I like punchy low end, but it has to be tight/precise. 9) Other than the different heater wiring, I really have had no problems with the Soviet-era tubes. They sound really good to my ear. 10) I originally designed this with a Merlin-style ground lift to allow wet-dry or stereo rigs without ground loops. For whatever reason the ground lift was a noisemaker on this amp so I just ran a conductor to bypass it. The ground lift worked like a charm on my ReVibe; no noise, no problem. And I have no idea what made the difference. 11) The only real "bug" left is that there is hideous noise when I plug in the reverb footswitch. It's not the reverb circuit per se - I can get really nice reverb, or use the dwell and volume to turn the reverb off. But something about the dang footswitch just does not want to play nice. Again, odd, since it's the exact same foot switch circuit (and same actual foot switch) that works fine in my ReVibe. So still to make the cabinet. And there is a pointless entertainment feature I don't have quite sorted out yet. So I will probably post an update down the road. Overall a satisfying project and a very useful amp for playing at home volume levels. I learned a lot about all the tweaks you can do to change the voicing - coupling caps, tone caps, mixing resistors, to name a few. Also drawing load lines and fooling around with hotter vs colder bias. In the end I found a clean bias I really liked and a cold clipping bias that I really liked also - I wasn't willing to give up either one, so that is what inspired the push-pull bias switch. My other projects have all been very thoroughly sorted out by others before I built them - so not a lot of "I wonder what value this cap should be?" - pretty much build by numbers and start playing. The next time I build an amp and want to tweak the sound a little, I'll have a much better idea what to do.