Hello Everyone, I have an amp I built, that is currently a single input, single channel 5E3 derivative, with a simple volume and tone circuit. The two red Jupiter coupling caps are .022uf and the rest is fairly true to the 5E3. I would like to try replacing the existing phase inverter with a long tail pair circuit. I'm hoping to do this as simply as possible, building on what's already there. In the photo, you can see that I have one unused triode at V1 (12AY7), if that helps. This mod is for my own curiosity to hear what happens when you take out the typical 5E3 PI induced distortion from the equation. I'm not in need of more headroom. Just want to hear the impact on overall character. Please advise, and if possible, direct me to a layout drawing of how the changes to the board might look. Thanks very much for your time and knowledge!