The Christopher-Jin has been fitted with a second pair of Genoa Tracks and Standup Blocks. The tracks are two feet long and are mounted against the cabin, just below the windows. The primary use for these was going to be for control lines for the Spinnaker.
I bought them through Catalina Direct. All though the original tracks are unique to early Catalina 22's I purchased the same style so the parts would be interchangeable.