Another day spent wiring my neopixels. This time, on my correct sized model, that wasn't sabotaged and didn't fail to print correctly. Happy days!
It took me about 5 hours in total to wire up 20 neopixels which is an improvement from the last attempt which took 2 days. What really made the difference this time was tweezers. They were really helpful to hold the wires in place and also helped avoid burning my hand.
Now that I've got them all wired up, I can start mapping out the light behaviours and code the Neopixels accordingly.