I've been working on this idea for a while, trying different designs to mix together an overdrive and clean signal using a dual gang pot.
It started life as a modified DS-1/Big Muff hybrid, which I couldn't get to work so I went with this. It's an electra distortion and parallel common emitter stage with big muff tone stage and another CE stage on the output.
https://youtu.be/EyDqdmLFaWA
Sorry not sure why I can't get it to embed the video.