Finished my builds yesterday - both tested out driving stereo flawlessly. Monoblock conversion will happen tonight.
The build was easy, I only made two mistakes:
1) Forgot to clip a lead that shorted, causing OA voltage to only be half of what it should have been. Pretty easy to find once I was looking for it.
2) Knocked one Kaiju off my worktable, metal edge first onto my bare foot. Probably was lucky not to break anything, but have a foot-sized bruise to show for it. Pro tip: Don't knock your work off your table.
Will follow up in a couple days once I've played with the monoblock config.