In the fall of good old 2011 I decided that it would be a nice thing to have a tube overdrive not on top of my organ but inside the housing.
Solution: I built another overdrive, just the same as the last one and fixed it inside my Korg CX-3. This was a pretty smooth ride. This time I plugged in a Telefunken 801 (special quality ECC81). I found that one in a piece of old medical equipment that was thrown away at the hospital where I had to do my alternative service.