I put a note in the back of my log and stated that all CL-65 entries would be noted by the following designators: CRJ2, CRJ7 and CRJ9. I signed it and put my digits behind it. It's good to know the differences because if you have an application that has a/c weight listed on it, then you'll know how much of what weight you have flown.

Doing this worked for me!