You can now limit the amount of Protection Cores a player can place with the permmision protectioncore.limit.[x] . Where [x] is the value or * for unlimited. With /pccount you can view the count of placed Protection Cores you have.

IMPORTENT: If you migrate from an older Version you need to use /pcfixallcount to update the counts of old players.

If you accidentally remove a PC with Worldedit use /pcfix and /pcfixcount [Player] Remove to fix totally remove the left over regions.