Hi there, thank you all for your contributing to this thread!
We’ve been following it closely and your feedback has not gone unheard.
There is a new package for manual installation available for download here, it’s for build 107 - the latest at time of writing. The script now addresses an error that can be introduced by installing software manually. As long as you use the latest available package, you should not be getting stuck in Fastboot mode.
As always - in case of any issues, #contactsupport
Cheers