Change protection from CPM to CPP

Hi,

I have a 10 nodes cluster with 6 x nodes 4TB and 4 x nodes 8TB.  The cluster is only 20TB used in CPP.

I would like to change the protection scheme in CPP instead CPM so I plan add 8 x 8TB nodes as Cube 2 and perform CICM.

Just wondering will the system prevent me to change the protection to CPP due to Cube 1 different node size issue.