I used the altimeter basically for establishing high energy gate altitudes for the various aircraft I displayed by using a hard deck in practice before actually doing a display.
During the display all I wanted was a quick check through the gate for altitude and airspeed being married. The angles and geometry used to commit to vertical down lines were eyeball vs the gate parameters.
For rolls, you can take the panel right out of the airplane.
Eyeball all the way!
DH
Glad to see I'm not the only "old grouchy retired guy" on the planet :-)))))))
DH