There's always a chance

I actually have balls on my shelf slated for this project. They are just waiting for me to do something with them.
There are a number of challenges to the implementation of the ball to the shaft however (eghh! this is starting to sound dirty...so please try to refrain yourselves

)
Some shafts have very small diameters that don't allow for holes to go through the center unless they are very small. Then there is the issue of either a slip connection somewhere or a limiter to prevent stick rotation from winding up the wires until they snap. 2 wires are one thing, 4 is another.
All that being said, the Retro edition of the OMNI-Stik Prodigy currently has a hollow shaft that would work for this and I have been contemplating just offering the RGB ball-tops for folks to do with them what they will. Any interest in this?
RandyT