Yea, I'm bummed I didn't know about the 40-CU unlock, although it probably wouldn't have had much impact on mining performance. It still would have been neat to test. I did build a whole automated solution for auto-tuning each individual board. It would start at the "best" settings and then downgrade every time there was a crash. If it wasn't crashing, then those were the new "best" settings for that individual chip.