Originally Posted by abshipp

Gotcha. I guess just try flushing it a few more times and cycle it a lot. I think that a select few people have successfully overhauled Shimano STI stuff, but they are few and far between,. They really don't like going back together after being taken apart, unlike Campagnolo Ergopower levers.

eBay has quite a few in the $70-$100 range. Seems like the path of least resistance if flushing doesn't work. You should be able to swap one out without even needing to remove bar tape.

However:

As a regular Addiction poster, I am required by Addiction bylaws to recommend you look into the Cervelo closeouts on excelsports.com and pick out the R series of your choice.