you probably won't care for this fuzz, it's pretty weak and mostly nostalgic.
2n5088's as most suggest are way too hot, and will kind of ruin the tone, imho..
the tone control is more of a fuzz contour than a tone or volume....it does have a very minor effect on volume, but i think
that's a psychoaccoustic phenomenon from the treble being rolled back.
that said, if ya sweep it with an lfo, it sounds VERY cool, kinda phasey..