Bought a used CS8 frame on RC Groups and I was pretty shocked to see what I got. Since I have a CS6 frame that I bought from QC I have something to compare it to. Looking at the surface, I can see many pock marks and voids in the CF plate itself, which also has a rough surface, not like the smooth surface of the CS6. The cutting is very rough and has spots where the bit went too far. It almost looks like there is fiberglass between the top and bottom of the plates. The quality is obviously much worse than the CS6 frame I have. This frame is supposedly a year old, but my CS6 frame is from March, so not that much younger. Is there any quality difference from the older ones? This guy is also selling 1000mm octo frames with the same specs and design as the CS8. That was a big uh oh. I didn't see this till after I bought it. http://skykopter.com/home Will post pics in a min.