Announced this a while back, stating that the idea had to swirl in my mind like a fine wine. A bunch of commissions came up and gave me ample time to do this, basically, and then I actually went ahead and did it.
I wanted to do an effort piece involving Octavia and Vinyl Scratch for a long while. Yes, there was "In Honor of Princess Luna", but that one was primarily focused on Vinyl Scratch, with Octavia stashed in the background. Also, Octavia is one of my favorite background ponies, so it makes sense that I wanted to do a proper rendition of her as well.
Fairly early on I had this idea to do a yin-'n'-yang sort of thing, but I wasn't sure how to go about doing that. In the end, it came out nicely, if I may say so myself.
Also, I'm aware that there still some ambiguity on Vinyl Scratch's name, which alternatively DJ-P0N-3.