That is a work or art Lawry, thank you for posting it for all our benefit.
What is the heat like from the 12AU7? Caged fully external mount or maybe socket inside box with half tube out through hole etc?
As an aside, have you checked out the AX84 projects? And, if so, what do you think of the October associate project? The Studio version (with FX loop and dual 6SN7's options) looks very interesting, particularly the preamp, but the Club is also tempting (albeit a lot more costly than something like the Lamington). I re-tubed my 5watter yesterday and your fuzz box project has now reignited my urge to build one... maybe