Holy Mudder a Gad - a tube overdrive

[gordo]

I'm really stoked about building the Uber Tuber.  This looks like a fun little project and after building the Grind 12ax7a in a few variations (still put the Atomic 16 on my board when I need drive so thick you could eat it with a fork) I'm looking forward to a now-becoming-fashionable 125b footprint.  I BBQ'd myself on the Grind circuit a few times so the 18v will save a few nose hairs.