Ok, manually flashed bootloader, radio, and os for PQ3A.190801.002.
Left bootloader unlocked.
Booted phone, verified OEM unlocking was turned on, and turned on USB Debugging.
Downloaded new copy of .8.9 installer and ran.
Accepted (and remembered) USB Debugging request on phone.
Selected stable UT, with wipe and bootloader flashing or however that checkbox is worded both selected.
Installer flashed recovery.
Rebooted to recovery, waiting until windows recognized the phone again and clicked continue on installer.
Now it is sitting again at "Mounting partitions..." with no indication it's going to move, ever. It's currently been about 10 minutes at this step. Phone is sitting in recovery and installer is sitting on that screen, nothing happens.

Yes, I used the factory image from https://developers.google.com/android/images and had it reflash all partitions, since I was aware Calyx did some stuff to mess with partitions.

I attempted with .8.8 and .9.1 on Windows, and with .8.9 on Fedora. All with same result. I did not try with .8.9 on Windows yet, I will try that.

Process will be as follows: Reflash PQ3A.190801.002
Unlock and enable USB Debugging.
Download .8.9 installer.
Attempt to install UT.

I'll update with result.

Yes, I am able to install any other OS without issue, I can OEM Unlock from within Android, bootloader confirms I'm unlocked.

EDIT Also, I purchased this device brand new direct from Google when the 2 was still 'new'. I am the only owner of this particular phone.

Yes, I have tried with and without wipe, makes no difference.

Hey folks,
I've been trying to install UT on my Pixel 2 Walleye with no success. I've tried both the release and beta versions of the installer on Windows and Fedora with the same results and I'm stuck.

I've made sure to flash to the recommended Android 9 version multiple times before starting. Every time, the recovery flashes just fine, I can boot into the UBPorts recovery, the installer downloads files and queues up, and then either gets stuck at "Mounting partitions" for hours, or passes that and goes to "Clearing cache" for hours. Nothing else ever happens.

Unlocked, USB Debugging on, have tried from a CalyxOS install, from Stock Android 9, starting from bootloader after a failed UT install, all result in the same thing.

Any pointers? Thanks!