So I got around to buying Catalinbread's Manx Loaghtan Fuzz, and I'm pretty happy with myself. In essence it's a hand-wired Big Muff with a Baxandall tone circuit instead of the Muff's single tone knob. It's a much more versatile pedal than the Muff is, with way more clarity and a butter zone as wide as the tone knobs can turn. Whereas my Muff Pi tended to get sludgy and muffled doing arpeggios, the Loaghtan cuts thru the dirt on most settings. In my case, I've been throwing it through a massive reverb and creating distorted soundscapes, and it does the job perfectly. Only gripe? Fucking side-mounted power jack. Annoying as hell to daisy-chain.