LG G5 boot into recovery show-stopper (maybe not understanding the manual)

Hi, I promised to come back and report on the how-to. Recalling the issues I ran into, I have to admit I was impatient in step 8 of my earlier report. To others going through the /e/ install process on LG G5, further ref. as the installation manual, I suggest to do the following at 6. Now reboot into recovery to verify the installation.:

  • One should shut down the phone in order to boot into Recovery. There is no fastboot command or button yoga to achieve that. The only way to shut down I’ve found was pulling the battery as suggested by @archje in another post.
  • When phone is powered off, slide the battery in and follow the steps into Recovery in the installation manual. If unsuccessful, you have to try sliding in the battery at various times: before or after you placed your finger on Volume Down and Power. Sliding in the battery, triggers boot immediately.
  • Do not forget to slide in the battery completely, until the click sound – once in excitement, I didn’t and the battery was hanging out half-way. I was sweating when clicking it – the phone was running –Progress XX%– at the time. Half-way out, half-way brick?
  • Expect the Factory data reset and select Yes. There may be another Remove sth screen, before the actual TWRP Recovery screen.
  • The second step using adb reboot recovery in the install manual did not work for me. When booted and the adb command can be received by the phone, the TWRP has been already replaced by the original Recovery tool – that was my understanding.

Other issues I ran into:

  • In many cases I had to try connecting in MTP or PTP mode (alternating) to receive allow-connection request and be able to send adb command.

I went through a how-to-root video and they said in the video and the comments that it is crucial to downgrade to Android 6 in order to successfully enter TWRP Recovery. So, I went for a downgrade and it was a highway to hell. Here is a list of links that helped me to downgrade: