So just to continue on my journey and share with the other noobs out there.  I have (2) rigs.  Each with (12) AMD rx570 8GB cards.

I took the advice and while still on Windows, backed up the current GPU BIOS and then continued to perform the one-step GPU bios mod.  It was a lot easier than I had thought it would be.  And feel better with the original BIOS on hand if needed.

I used:
GPUZ (to view/read the GPU and also to backup the original BIOS)
PolarisBiosEditor 1.7.5 to load the original BIOS and click the one-step patch.  Save as the new modded BIOS.
Saved both to a USB stick.

Then with the high recommendation I moved off Windows and went with HiveOS.  I have to say, I really do like the setup.  Everything on one screen. And a lot easier to manage.  It's even easier to flash the BIOS as I as able to upload the (2) versions of the BIOS, select all the cards and flash.  Reboot and away I go.  (of course with overclocking settings in place)

I was getting approx 21-22mhs per card.  With this new setup I'm currently getting 30mhs - 31.5mhs


So thanks to those that helped.  It's nice to get it back up where it was when I was running Claymore previously.