Fantastic work, as always, @Dees_Troy. It's always nice to see (official) TWRP on new (and dev-friendly) devices. I've posted this to the XDA Portal.
Anyone happen to have the stock recovery? TWRP works great for flashing all the things, except the stock CM ROM. I know, I know, I didn't make a backup. I'm a baddie.
You can't flash a recovery while you're in recovery.
You can use Goo Manager, Flashify, or other apps of that nature to flash it while System is booted. Or you can boot into bootloader and flash recovery that way. I downloaded the recovery image and flashed it with Flashify.