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So I've built a Wavelord is completely functional with working LED's, but it emits a loud hum when engaged, and a slightly quieter hum when bypassed.

Link to photo Album: https://imgur.com/a/5Al3fFi

I used an NSL-32, and a 2n5457 for Q1.

Here's a sound clip: https://voca.ro/9ZyKQLSF7lh

Anyone else having a similar issue? I can do some voltage readings for stuff if you all need more information.

I have them wired up but I can't hear a difference when I flick the switches back and forth. I'm guessing I've either wired them incorrectly somehow...? I'm not sure. My friend was over and playing with it, and he can't hear a difference either. The Tone, Depth, and Rate knobs don't seem to do anything either, no matter where the switches are positioned. Otherwise, the pedal works fine with the Mix, Feedback, and Time knobs.

Here's a link to the short album I made of the guts. Sorry for the blurry-ness:

https://imgur.com/a/N1l0n

Thanks a ton you guys! I'll try wiring things up soon and post about the results.

My Civil War Mudbunny used to house a Green Big Muff:

http://tagboardeffects.blogspot.com/2012/06/ehx-green-russian-big-muff.html?m=0

So the pedal now has the 3 knobs, and a useless DPDT knob smack dab in the middle. Where could I run wires, if any, to that DPDT so I could make it a cut/boost switch like on the Big Muff above? 

I know there have been some posts on this before, but I can't seem to extract the information I need out of them. Madbean posted an image on how to do this ~3 years ago (on this forum), but the image has since been deleted. If I can get some help on this I'll be sure to post some snazzy pics of the completed build!

Wow. I could've gone my entire life making pedals thinking that the striped side was the positive side. I knew the long leg on LED's was the positive one, but I guess I can't put 2 and 2 together when it comes to caps. 

I replaced the caps and put in new ones in the CORRECT orientation, and now it works, no explosions whatsoever! I flipped the 2n3565 around (flat side facing "north" in relation to the board) as well, because I couldn't get much fuzz with it oriented the way it was originally.

Now, is there a way I could allow it to have even more fuzz? It sounds nice as is, but I have to really crank the knobs to get the amount of gain I want. Changing the diodes in D4-D5, perhaps?

Also, anyone have any ideas what I could use my leftover 2n404A and 2n3565's for? I suppose I could just make another one of these percolators, but where's the fun in that?

I made a photo album of the before-and-after here: http://imgur.com/a/REw6B. I took pictures of the packaging for the 3 axial caps I used.

C1 is a ceramic 100pf cap, D4 & D5 are 1n4148's , and D1 & D2 are 1n34A's instead of 1n695's.

This is the THIRD time this has happened, and probably the quickest time it took to explode. The first time it was  a 100uf 35V cap, which allowed me to hear the pedal actually work, fuzz and all, for about three seconds, then BAM, the cap exploded. Tried it again with a 50V cap, still the same result. I meant to record this last test on video, but it exploded 2 seconds after I plugged in the power supply. The effect wasn't even on; it exploded just from being plugged in and bypassed!

I can check transistor values in the morning if that's necessary. Any help is appreciated! My Mudbunny build went without a hitch, I'm surprised something as simple as a Percolator is acting this crazy.