So Hamid:  Is Brent your "Daddy"??  Seems if anyone questions his point of view, a point of view that is admittedly bias as a result of 10 years of association with Chelton, well you are right there with a heated counter attack.  I would observe there is enough uncertainty in the D2A situation to make room for multiple points of view.  Additionally, I found no:

Ad hominem, ad nauseum

in John's observations, but rather an insightful analysis of the forces that shape all markets, and certainly GA/Homebuilt aviation.  So Brent/Hamid given you are tied to Chelton's coattails maybe you could be more tolerant of points of views that are less revenue driven.

Paul, N94PT with a Chelton system and X-bow 500, already installed, thankfully.