Pcb question

Those are separate. Technically don't need either to make the circuit work. The LED is used as an indicator on/off light. The breakout board is not necessary, but makes wiring a bit easier.
 
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For the LED, it's really up to you what kind you want in terms of size or color. Connections are the same for each. I tend to like 5mm LEDs with a bezel (holder to keep it in the enclosure). As mentioned above a breakout board is not 100% necessary, but they are sold here.
 
Which project shows a 3PDT daughter board in the build document? Also, there’s a footnote that says common offboard components are not listed in the BOM.
 
Exactly. I don't know. This would be my first build. I know nothing about this. I don't see any footnote. It is a bill of materials. It should at least include a separate part of the circuit.
 
You're right. I guess the updated BOM style doesn't include the footnote that used to be there.

This used to be included in all build docs:
pedal pcb footnote.png

It is a bill of materials. It should at least include a separate part of the circuit.
What does this mean?

There is no breakout board depicted in the wiring diagram. This shows you how to wire a 3PDT switch directly from the board:
el sol bypass wiring.png

Also, this thread might be helpful for you.
 
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