Not my system. Please note my post was quoting Ed Gray.

As a developer of certified PFDs, MFD, ADAHRS, MSUs, etc. I agree with Michael.

If you plan to fly IMC without a spinning mass backup OR a certified EFIS then you are "Dead Man Flying".

I have destroyed too much equipment during per-qualification testing of certified equipment and have done too many post crash analysis for the NTSB to have any other opinion.

Regards
Brent Regan

On 1/18/2012 6:11 PM, Michael Newman wrote:

Your dual systems are running the same software. Which (in my opinion as a
developer of such software) is the MOST LIKELY point of failure in the
system.


Ed Gray writes: "I have no steam gage backups.  With dual screens, 
backup batteries and dual ADHRS I feel that I have enough redundancy.  
Does anyone have input or comment?  This plane may be one of the first 
with no round gauges anywhere."(sic)