Gents:  Just saw this in "Sport Aviation."  I have two Cheltons and a backup 
steam ADI.  Seems this little unit gives Airspeed and Heading and Altitude and 
VS, as well as attitude.
 
 Any reason to not replace my single purpose steam attitude indicator with 
something like this for a thousand bucks?
 
 Cheers,
 
 John Hafen
 IVP 413AJ 350 hours