According to Gigabyte support, the first round of testing is hardware and then they do software tests, which evidently haven't been performed yet. The support person said that he would stress that they specifically look at the wireless.
As to the "Clean" install, I plan on putting the USB 3.0 stick with 1709 in and hit the power button and hit F12 to change boot order to the USB stick and re install 1709 from scratch. I originally bought a retail copy of W10 Pro license so there shouldn't be any problem re activating it once re installed even with a different MB if that becomes the case.
On my original OS install I noticed something that I thought was a little strange. I had my NVME 512 GB stick in the #1 NVME slot and a 1TB SATA 3 HDD hooked up to the #1 (not #0) SATA port on the MB and when it got to the part showing the drives to format/install in custom/Advanced, it showed the 1TB SATA drive as drive 0 and the NVME drive as Drive 1 so I just chose the 512 GB drive to format/install. So it ended up that C (OS) was installed on Drive 1 and the Storage drive (which I formatted as MBR after the install) was still drive 0.
The reason I'm bringing this up is that I think this time on the clean install, I will have the 1TB SATA drive completely unhooked before doing the clean install. Does that make sense??