whereas the TC does show the degree to which
you're banked.

The TC does not show bank. It shows rate of turn, and has a temporary
indication of bank intended to "lead" the turn indication. If you slip
or skid, the TC will shortly indicate "straight" (non turning) flight.
Even though you are banked, you are going straight.

Nonetheless, it's what I would use as primary, if I only had that and
the whiskey compass.

Jose
--
The monkey turns the crank and thinks he's making the music.
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