I'll try my best, but I can't make any promises.
I just e-mailed Kevin about the extra wraps - if you are correct, then we have to go another route. I really like the idea of adding another piece of the shaft inside as you mentioned. I e-mailed him all my test results, and since he would most likely be the CF guru, I'm hoping he can give some input.
The white flags are the epoxy peeling off the ferrule. I kept them on for a more destroyed look ;) I am planning on adding some grooves on the ferrule for better adhesion aswell - and of course rough the surface. The angle idea is good aswell - the tests only call out for the axe to be tested in one direction (stress on the pick side, not the adze side), so maybe an angle on thew ferrule would allow me to lengthen the one side while shaving weight off the other.
I was thinking of placing the shaft inside the ferrule, so to speak. This would eliminate the loads that are breaking through the side wall and place it in tesion - which it handles very well.
Here's a page from the UIAA req's. As suspected, it fails the one circled.