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I recently completed building the 4:1 compressor.  I tested it and everything is working fine.  When the enclosure came in on Friday, I boxed it up using the 3PDT #4 with trimmer.  I have used these switch boards with all of my builds so far with great success.  However, on the 4:1, the LED was really dim no matter how I adjusted the trimmer.  In fact, adjusting the trimmer didn't make any difference at all.  So I took it back out of the box and hooked it up to the bench power supply.  The LED flashed a couple of times then went off completely.  I induced a small voltage across the LED leads with my DMM and it still works, so I hadn't burned it out.  Check, trace, check, trace, etc.  No luck.  I finally started checking voltages when I noticed that I had a good 9.2V at the input connections at the board, but only about 4.3V at the 9V+/- pins at the bottom of the board, the ones that go to the switch.  If I checked from the +9V pin at the bottom to the GND pin at the top, I got a full 9V, but when the neg pin at the bottom of the board is in the equation, I get really strange reading, anywhere from 4.3V to 1.8V.
I removed the stomp switch completely and re-connected the board to my test rig, and the effect part works just fine, but the only way I can get an LED to work is by connecting the negative side of the circuit to the negative pin at the top of the board.  For now I'm going to use another stomp switch and skip the #4 board this time.  The effect and the bypass LED will work that way,  But I would still like to understand what is going on.
I'm stumped and any help in understanding what is going on is greatly appreciated.

Chances are that it was not just sitting at your local PO.  The more likely explanation is that the USPS sucks at accurately tracking packages.

I have had similar experiences with a package where the "label created, waiting for item to arrive at PO" message was the only posting on the tracking site for a couple of weeks, then all of a sudden the package shows up at my door.  No updates between the west coast and Texas.  I'm pretty sure it made a stop along the way...

Another time I got a delivery notification the same day I got notification it was received by the originating PO.  Again, I'm pretty sure it didn't make it from Colorado to my house in 1 day...

Yes, it's a PT2399.

This is my 2nd pedal.  Boy in a Well from DIYGP.  Took 8 weeks to get the board thanks to the 'Rona, but well worth the wait.

Built it for my bonus son.  He's the one with the guitar talent.  He liked the sound so much, he put it on his pedalboard right away.  I was blown away by his reaction.

The wiring to the jacks and battery snap could have been a little neater, but I'm getting there.

Nice build.  Cool graphics.

Going to build one of these when the xfmr finally arrives in late July...

Thanks to everyone for the encouraging words.  Honestly, this is my very first ever pedal.  Definitely not my last.

I have completed another one since this one, but it is not an mbp board.  I have another mbp board I'm working on, but waiting on parts.

Thanks EBK for the tip.  I use powder coated enclosures as of now, because I suck at painting.  Will go back and grind off some of the paint, just to be safe.

This is my very first build.  Honest critiques would be greatly appreciated.

Already know I don't like the greenies...

Thanks for looking.