I use molex connectors every now and then, and I use a good pair of needle nose to crimp the pins onto wire. I've not had a problem with any of them, though, keep in mind I've had 30 years practice! I would definitely recommend them, they make for a good board connection. In my experience, pin...
I've used both, and there's not much difference. The top adjust MAY be a bit cheaper in construction, so may want to use it for voltage divider or something "set and forget" as opposed to a function you would need to adjust regularly..
I've had no issues with pedalpcb's jfet buffer boards. They have all worked great. Like you said, they are intended to be used in conjuction with effects boards that have power filtering.
I've found the 680n/470n debate moot. It makes little, if any difference. The 680p in the tone stack is probably the one that makes the most difference, I've found 100n to be just about right, and sounds most like the original.
I HIGHLY recommend. Might socket C7, I found 100n much more to my liking. That 680p just doesn't feel right. Fuzz on full, volume all the way down, ahhhh beautiful!
YMMV, but I've never felt like I needed that on mine, at least the ways I've used it.(before/after fuzz, pushing front of amp, cocked wah) It is definitely a useful pedal after the learning how to dial it in!
You know, I had an order from Tayda come in the other day, and 2 of the pots I've checked so far were VERY stiff (Tayda branded) until the grease got spread around good on the inside.
I very seriously doubt you will have much of a problem with noise, along as the box is grounded. Signals and voltages in those circuits are small, and consume relatively little current. Interference from outside will be the consideration. Not to say the circuits as designed and built can't be...