One thing I forgot to note is that the logic signal is fine as long as Vcc is taken care of as described. Due to the waveform reshaping in each 2812B, you can chain an unlimited number of them.
Espruino is a JavaScript interpreter for low-power Microcontrollers. This site is both a support community for Espruino and a place to share what you are working on.
Thanks for that, I've spliced in power every 90 lights and it seems to be holding up well, but I have yet to try to animate it.