Totally calm days are few and far between where I live, so I've traded in the CX for a CPP. I'm planning to downgrade to a CP head for now, and move the paddle weights out. Do I need anything besides the blade grips? Can anyone provide a complete list of the replacment parts?

That is all you need.I just did the same,you will need to use all(4) bearings that are in the blade grips on the cpp.

Down grading to a CP head is harder to fly than keeping the CPP head...... this is why I up graded my CP to a CPP...