Agreed
Best way to update to the latest firmware is to use the factory image, so as to avoid reflashing anything
1. Compare bootloader version. If different, flash new bootloader image.
2. Compare radio version. If different, flash new radio image.
3. Flash system image:
Code:
fastboot update image-redfin-buildnumber.zip --disable-verity --disable-verification
4. Allow update to complete, device will reboot into system.
5. Patch and flash boot image.
I recommend allowing the system a clean boot on the stock boot image before you flash a patched boot image.