Step 8: Make a bed for the LED.

I used a wooden stick to make a bed for the LEDs. This is to avoid them to be pushed into the pedal's case and to protect them from rattling. I just superglued it to the inside of the case. No rocket science here.
How do I invert the switch? When I turn my Vibrato on, it turns the light off.
Sorry to be this slow to answer. To invert the switch, just put the LED ON wire (the red one in the schematics) on the opposite side of the switch.
I cant help but wonder why you opted to use a battery wrapped up in tape over a 9v clip, or for extra hack points a paper binder clip that has been bent out of shape
I'm not sure what is your question about (maybe it's because English is not my native language), but I'll try to asnwer it as good as I can. I wrapped the battery in tape to avoid short circuits. Since the footswitch should withstand rude handling, it's possible for the battery to be shifted from its place and touch part of the wiring. If this happens, the metal skin of the battery could create a short circuit, and therefore a malfunction. You could use tape (as I did) or just any non-conductive wrapping such as foam or even a fabric piece. The other half of the process is to secure the battery to the case to prevent rattling and shifting. I used a rubber band, but two-sided adhesive tape can work just as well. The best option could be a plastic battery holder such as the ones used in some electronic products and guitars; these provide a solid placement and isolation, but I just used what I had lying around. Hope this helps.

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