I'm currently trying to build a Tremolo factory. It's been erm.. challenging. First the kit I got (Musikding) was missing a capacitor because I guess the circuit changed and Musikding wasn't updated I guess. I contacted Musikding and they were very cool about sending me the missing part.
A bigger issue though is that it simply does not fit in the enclosure! I chose the pre drilled option from Musikding as there are a lot of percisely placed holes required for this one, which requires more accuracy than I'm confident I can create with a hand drill.. And I'm pretty sure Musikding followed the drilling diagram closely. But once the pots and switches are mounted on the board it's then too high off the enclosure and too close to the edge to allow the audio and power jack sockets to be installed!
I did get it built anyway (hey I'm stubborn.. ) and it does work (with the power jack socket sticking half way out thanks to an extra nut working as a spacer.. ) but the audio jacks simply won't fit, I'll have to move them down to the sides beside the foot switches.. but those are spread out just enough to prevent them fitting there too.. so I'd have to drill 4 new holes and move the switches much closer together to allow the jacks to fit.
It does actually work now.. but the sequence leds work backwards to what you'd expect - right to left. I can live with that but one more issue is that the status LED never switches off.. I'm using the 'EZ 3pdt' board that came with the kit and the led connection seems to be connected correctly. I've used one of those switch boards before on another PCB Mania - a Hot Waffle, which was straightforward and works great.
One thing that I'm a little worried about is that my board is listed as v1.1 and I can only find build docs on the site for V1.0 and V1.2.. I hope mine wasn't an experiment that didn't quite work!
So, for me I've built 2, one (the Hot Waffle) works great but that was pretty simple circuit, the Tremolo Factory almost works but doesn't fit in it's enclosure!