Yes, I have the advanced manual but confess that I haven't read it too carefully. It sounds as though further study is desirable!
The Tormach Load Meter installation guide (
https://www.tormach.com/uploads/545/...A_WEB-pdf.html) claims that only older 1100 mills require changes to VFD settings; I've never changed my settings. The manual never exactly defines what is displayed but does say "if the meter’s needle is in the red zone, then this indicates that the drive is pushing 100%
current" (my emphasis). Hopefully other 770 users with load meters will comment on their VFD settings.