Anyone know where I can get the original firmware... I had it running great at 1000 mhz, then updated the firmware, and its having serious issues. WTF.

so pity, wtf same to you.
maybe you know how to rollback to previously version?
It turns out I had saved the 09142018 version to my computer. When I created a boot disk using it and the imageusb.exe then went and changed the miner.json like noted earlier, it is back to 7.2 on my Z1. So clearly something changed in the later firmware