How do I remove the inner shaft and replace it? I broke the very top near the flybar. I have unscrewed all the screws but can't seem to pull the inner shaft for replacement. Any help would be greatly appreciated.

Did you loosen the screws on the bottom gear? Just a few turns should pull them out enough to get the shaft out. To much and you'll pull them out of the gear(which you then have to line up becauses it will fall of the gear)

Here’s a link to a fantastic description of how to completely disassemble the CX. It includes nice pictures and tips. As a newbie myself, I found this to be invaluable:

http://www.dacaur.com/heli/bcxhelp/BladeCXAssembly.pdf

Perfect Thank you!