I've got a rudder in my shop as a reminder.
I flew the CH-640 for about 0.5 with the marketing director of AMD, John Degonia, at AMD's home in Eastman Georgia. Then when my wife and I attended the rudder workshop, we went up again, this time with me in the backseat.
That's what killed the deal for me. I'm only 5'9" and I had to sit cramped and sideways to even sit in the backseat.
Both times, however, Degonia gave a very quality ride, and even acknowledged that the CH-640 is a 4-seater like a Ford Mustang is a 4-seater, with a little ledge in the back. Performance out of its 180 HP engine was very good, however, and the airframe handled very nicely.
We were and still are impressed with the service of the kit owners; we just realized that we couldn't live with the not-really-4-seater experimental stretched version of its certificated 2-seater mother ship, the Alarus.
Too bad for Zenair, though, because I really liked the $25k cost of the CH-640 kit, not to mention that almost all of the parts come off of the same assembly line as the certificated version, which, last time I talked with them, had no ADs or SBs after 6 years of service.
So I'm going to build the RV-10. I'll be ordering the Tail Kit after going to the Lakeland SportAir workshop the end of this month, and I'll willingly pay the extra $15k for the established lineage of Van's to get the room that I need for my growing family.
So does anyone want a CH-640 rudder for posterity?