[Elecraft] audio input level setting for FM packet

[Jim Weatherford]

I've recently started using my K3 with internal 2m transverter for accessing the local emergency communications packet BBS system. I know for sideband digital modes, the recommendation is for 4 bars with the 5th flickering. Does this also apply to FM? I want to make sure I achieve nearly full deviation without over deviating, but do not have test equipment to measure.
Also, any recommendations on a K3 compatible external transverter for 70cm are appreciated.
Jim, WU6K