update??
but I just did the changes to one of my 847s
started with one like this

and finished with it looking like this

I used 0 ohm resistors instead of a? solder bridge
and i cant find that the changes did anything at all
except causing me to have to reset all my settings and memories
it gives "error" when going out of any band from 160M - 70cm
I enabled the AK emergency channel? in the menu and it will TX there
but it would have done that any way?
anyone ever have success with this?