J_T
It has been a long time since I even contemplated needle, ball and airspeed, but can any acro be accomplished partial panel? For example, a roll properly done should not show any turn rate. A loop should have no turn until 90 degrees of pitch, then lots of turn!!
In the '70s, the USAF only discussed partial panel, it wasn't a eval item. We always had a "peanut" gyro until I got into the C-5, where 3 INSs and 2 AIs were thought "good enough". Until a friend of mine had to do a partial panel climb to "on top". VFR to another airport where VMC existed.
GF