My Brother-In-Law has a CD25-D. The inboard diesel version (the "-D") makes for a great boat that motors much better than the outboard version. A very solid boat with a huge forward head that is almost as large as the one on my Sabre 38. Pretty good, well made boat but of a very dated design (Carl Alberg). Some problems that he has encountered:
1. Stuffing box exits into a sump and not the main bilge. I'd add a way for stuffing box drip to drain to the bilge.
2. Required replacement of the Westerbeke due to cracked head. Probably due to poor winter layup since I've had Westerbekes in my 2 Sabres and never had a significant problem.
3. Crazing in the gel coat around the deck. They had the deck re-gel-coated.
4. Delamination of the cockpit sole that required rebuilding the entire cockpit. Check for soft areas around where the tiller exits the cockpit sole. Expensive repair.
5. Inboard diesel is great but access is really tight. If you do your own work now is a good time to lose weight.
6. Fair amount of weather helm that may be solved by new sails/rig tuning.