Mira no HB is that Mira (unofficial)?If you can't get that tutorial to work with ANY exploit (try Mira No HB, not regular Mira though) then I'm started to suspect it's the SSD.
There would be nothing else to try but changing hard drives back and you probably don't want to try that. I got no other ideas it should work it does for me just fine. Or maybe you're not following the tutorial exactly right I have no way of knowing.