I finished the Harbinger 2 this morning. What a great pedal! I sounds great. I took the advice in the build document, and took my time. I wired the speed treadle backward, it makes more sense to me that way. I used a 3pdt switch to add an LED. My thanks to Madbean for the excellent project, and the great instructions. I think the switch diagram has a small error, it shows the effect out and the line going out to the output jack being swapped. I noticed that the build photos are correct though. Anyway, thanks again Madbean, I've built several of your pedals, and I'm very impressed.
I'm not getting the YouTube video to load. You can search for my vid on YouTube by search Madbean Harbinger 2 Build on Mike Bills channel.