Can't wait. Been looking for something to flash.
You can try this thread for Bootloader.
As far as your question, Id love to help but I think Ill wait for someone else to chime in. I dont like to give and answer about bootloader...
OK. Figured it out. Download the apk from this link. Its an old very of vvm
Turn off WiFi and set up vvm with this app. It will set up OK, but on second launch I was getting FC. No worries...
Just wanted to say thanks again for your work making this device long outlast its expected lifespan. I also apologise for this DEVELOPMENT thread becoming a q&a session that typically can be solved with a search and a little research.