One thing interesting though, I didn't know there were A and B frames.
I guess(hope) it is more about cosmetic/finish defects than its structure, dimensions or weight.
Like with electric guitars, or many other products.

I'm going to remain skeptical on the "A and B" grade frames until I see some solid info on this. We still haven't seen much on the manufacturing of any of the Chiner frames.

Nicely explained :-) . Thanks for sharing the video! I'm sure when it comes to the actual building of a frame the complexity will be even higher. Also as described in the video, I guess that most frames are not just made of one type of carbon. Therefore speaking of T700, T800, T1000 is rather a marketing issue.
My two OT cents.