Thanks man, that was incredibly useful!
I think of using that one channel as a two-way switch control (so basically on/off), then connecting that channel/sending that signal to either Arduino Nano or Uno, and then using the PCA9685-II2C Servo Driver to control servos. It shouldn't be that hard to add a bunch of delays and make it wait for the next input. And I guess that should solve my problem! I'm new to this, but it doesn't look too hard to do!
Thanks man, really really thank you!
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