I guess I have to be the first to point out that a new frame is the answer to your problems.
Buy one of those wonderful Habanero cross frames, and swap your Ultegra set over to that. Mount fenders on it, and you have a fantastic Titanium rain/bad weather bike. You can even put a rack on it and use it as a fast commuter / errand bike.
Then, get a new DA group, put that on your Habanero Team frame.
You're welcome.