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I'd like to build some sort of switching pedal so that I can do some pedal shootouts with all of the various pedals I've built over the years.  I've found 2 different schematics on Google but they only partially function.  I'd appreciate any suggestions, thanks!

I'm putting together the Archibald and just noticed that I didn't order a 15v zener but I do have a 12v and a 16v.  Can I use either of these without any issues or should I just order a 15v?

Hi, I'm trying to troubleshoot this Standout and I could use some advice. When I engage the pedal it sounds heavily distorted so I checked the voltages on the ics (JRC4580DD) and I'm hoping some can steer me in the right direction.  There is one value that is very off:
Upper IC reads:        Correct voltage:
3.96   0.0                 3.67    0.0             
4.72   3.72               4.43    3.77
4.73   4.55               4.43    4.21
8.67   4.55               8.18    4.44

Lower IC reads:      Correct Voltage
4.54    0.00             4.21       0.00
4.54    3.89             4.21       3.67
7.96*  4.73             4.21       4.44  *this is likely the issue?
8.18    4.73             8.67       4.55

Can someone please point me in the right direction? 

The BOM I have for a Mini-Mu lists a single 65k resistor and I can't seem to find one anywhere.  Can I use a 68k in place?

I threw together the Snack Shack fuzz pedal that Madbean threw in as freebie.  It sounds great when playing but I noticed that when I roll the guitar volume below 1 1/2 the guitar sound drops out and is replaced by a squealing tone that is constant in volume and pitch.  I don't hear anything unusual when the guitar vol is set higher than that.  Any ideas where to begin troubleshooting?