First thing you need to check is if your stem is one that has been recalled. Many of the quill stems were. You can do that here:
http://cdn.cannondale.com/Manuals/20...ulletin_en.pdf
If you stem a threadless stem, why not just flip it over and see if it give you enough height. Do you know what the percentage drop is on the current one?
__________________
A conclusion is the place where you got tired of thinking. - S. Wright
Favorite rides in the stable: Indy Fab CJ Ti - Colnago MXL - S-Works Roubaix - Habanero Team Issue - Jamis Eclipse carbon/831