All use the namespace of polishedprimitives.(ID)
Some of the normal mod events check for modifiers to be enabled or disabled, so proceed at your own risk.

hidden window, change all capital worlds size to 20
polishedprimitives.8000

hidden window, slow down global growth rate by 10%
polishedprimitives.9000

add any of the stable bonuses, overlord side only
polishedprimitives.9500

hidden window, toggle primitive assistance debuff on self
polishedprimitives.9501

hidden window, toggle vassal defences bonus on self
polishedprimitives.9502

hidden window, converts all unstable vassals into stable vassals, may cause bugs
polishedprimitives.9503

You can activate these in the console. Will update these as needed.