Odd bits
Re the vernier throttle, which may have been the only knob available one day, one ag-180 had a large round "house" door knob on the pass. side (which said door came off in flight once), and another had a Piper style trim wheel on the roof.
When the super stopped flowing past the tail plane it goes nose heavy . . just when you want a tight turn, so a fast trim was handy.