Interesting problem. I completed and tested this build and it worked fine (though a bit noisy) before I installed in in the enclosure. Once I put every in, it stopped working entirely. No signal when engaged or bypassed. A bunch of experiments determined that it worked as long as the input jack wasn’t in the enclosure. Seems to me that maybe something is getting grounded that shouldn’t? Needless to say, I’ve checked and rechecked the wiring and it appears to be correct.