By “Major Title” core, we’re referring to the core scripting taken from the titles at SubliminalClub.com, like Emperor or Limitless. This allows you to make customized versions of the major titles with the modules and scripting you want. That being said, adding too many cores to your custom will increase the amount of time needed to see the results. Multiple cores can also cause more reconciliation. The less there are, the more focused your subliminal will be. A good recommendation is no more than 3. However, you are always free to experiment.