I haven`t heard of a Carbon Cub for FSX, much less P3Dv4. Some planes I can think of that may come close are Flight Replicas`Super
Cub Experimental, Extreme, and Ultra, all part of their FSX Super Cub series. Although for FSX, they seem to port over well enough to
P3Dv4.
As far as I know, A2A hasn`t upgraded their Cub to P3Dv4 yet. I tried porting it over to P3Dv4, but there were all sorts of things that
didn`t work properly.
- Rob