Add rotation to Ken Burns Effect

I have found the original Ken Burns.moef effect in my finder, and I want to modify it to have a rotation option as well.  I've opened it, and found that it's just a simple effect, but they have key frames at the beginning and end for position and scale.  I added rotation, but it's not letting me save it.  Any ideas? (BTW, I saved duplicates of the original file and it's folder just in case.)

Something mentioned here previously might help:

fcp.co/forum/4-final-cut-pro-x-fcpx/3493...ion-templates#121756