Originally Posted by
DRietz
I know Cannondale's carbon steerers come OEM with a star nut...
Cannondale carbon steerer tube come OEM with an expander bolt/plug, not a star nut. Star nuts are OEM on their aluminum steerer tubes.
In any event, the Park Tool website suggests it may be possible to drill out the center and remove the pieces if you really had to get it out. Sounds like a risky project however. If it were me, I'd get a proper compression plug and push the star nut deeper until I had clearance for the plug and then not worry about the extra 2 oz.