That's really cool - nice work.
I've only been peripherally following the neopixel advances - but it's starting to look like they are coming along nicely.
One quick question - I assume it would be possible to speed up the power down effect (with a qoff maybe)? it was a little slow in this video for my preference (it's not a criticism, just a preference thing). Otherwise the effects look awesome - I really want to see the localised blaster bolts in person. Combined with the fantastic new multibolt feature that seems like it would be a lot of fun to play with for choreography.
The Ascend is still my favourite 'practical' saber of any that I own - so a nice choice for a neopixel. I recently upgraded mine from a really old CS to a PRIZMv5.1 - the change in response with the new motion sensor is a complete game-changer in my opinion (and you will have that with the CSv4). Nice score