I was actually the first original owner who had it built. It was sent back for the 2nd channel to be modded and for the faceplate to be replaced since it cracked/chipped during shipping. After Zach decided to build me another one off a custom PCB with most likely one-off options for him (at least for now), he sold it to what I will have to guess is the list as some of you have stated (FastRedPonyCar, etc.).
If you have listened to some of the Custom 100 videos out there, you will absolutely love it, without question. It has the best clean channel I have ever played and a lead channel that will blow your mind. I almost never used clean channels for anything until I got this amp. The original crunch was so dark and thick that I found it 100% useless for anything. I have no idea what Zach turned it into, but if it was anything close to what we discussed when I sent it in, I bet it is awesome.