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I recently did a bit of work on the original version of this kit, a clone of Chris Carter‘s original Gristlizer; an analogue effects unit used by Throbbing Gristle. This one seemed to have the wrong type of LED on it (a blinking one), fitted backward so it wouldn’t illuminate.
After replacing the LED I hooked it up to my x0xb0x and ran some audio through it. It definitely seemed to be doing something to the sound, but I’m not completely sure what. I’m also not sure how it’s supposed to sound, so I don’t know if it’s working quite right or not. Since it’s analog and a lot of the pots and switches ground through their chassis, it’s hard to say what it’s supposed to do until it’s all buttoned up in a case. I have a feeling that some (or all) of the op-amps on the board might be cooked, but I don’t know enough to tell right now. At <$1/ea it's also easiest to test them out by just replacing them. (After looking over this PCB and photos of the v2, I can't help but want to pull an SDrive NUXX with it and release a much-improved, CC-licensed PCB / BOM / end panel set. I think I could do a much cleaner job on the board design and incorporate very useful connector footprints that allow flying wires to be terminated at headers, direct-mount pots, etc. I’d also like to do an end panel set that fits right into a nicely solid off the shelf enclosure. This would make assembly easier for kit-builders easier resulting in far more elegant devices with less room for assembly mistakes. Maybe this will be a winter project.)