Posted for "Matt Hapgood" <matt.hapgood@alumni.duke.edu>:

 Related question.
 
 My 320 currently has lots of electronic items – Sandel EHSI, Garmin 430’s,
 STEC autopilot (replaces the Turn Coordinator), and ONE vacuum instrument –
 the Attitude Indicator.
 
 I like the idea of one of these 2 ¼” AI’s – it would be an ADDITION to what
 I am already flying.  I fly lots of IFR, and my current backup is… the
 autopilot within the electric TC.
 
 Another AI would be a benefit, and I’d have lot’s of time to compare it to
 the primary (and TC) to check it’s functionality.  If my primary fails –
 it’s an EMERGENCY = LAND.
 
 Better than my current nothing?
 
 Matt