I don't know the best answer but I create pixel props instead of CCR's. I create them within the existing visuaIization and can vary my pixel count to anything I want. I then Rename and save the .lee file
The newly modified visualization can then be exported to SS. If you create a little sequence in SS and then export that back to an .lms file. Open it in sequence editor and you will see that SS has added your new channels into your configuration with your new props added. Export your new channel configuration and save it.
Anytime you wish to add these new props to a preexisting sequence just import your newly created channel configuration and voila. Fill in the blanks to sequence your newly added channels.