Had to wait a couple of days before I could give this the attention it deserved. Worth the wait. That was awesome!

I'm gonna have to go back and re-read the whole thing in one go soon. You're doing a good job of signalling the callbacks and such, but I still feel like there are some things I'm missing, characters I'm getting confused because I've read the bits too far apart. Probably a problem on my end, not yours.