Creating a cadet branch decision

[KiwisFly13]

I thought it would be handy to be able to create a cadet branch of your dynasty if you are a bastard, legitimised bastard or kinslayer.

Below is the code I can only think to create a random dynasty, unless anyone knows it to be possible I would assume that triggering the dynasty creator page from the Ruler Designer DLC is impossible as its hard coded?

dynasty_decisions = {
	create_cadet_branch = {
		is_high_prio = yes
		potential = {
			AND = {
				NOT = has_character_flag = cadet_branch_created
				OR = {
					has_trait = legit_bastard
					has_trait = bastard
					has_trait = kinslayer
				}
			}
		}
		allow = {
			FROM = { prestige = 100 }
			is_adult = yes
			prisoner = no
			war = no
			male = yes
			is_father = no
			is_primary_heir = no
			capable_only = yes
		}
		effect = {
			FROM = { prestige = -20 }
			FROM = { dynasty = random }
			#or somehow decide on a dynasty name etc.
                        #has_dlc = ruler_designer
			recalc_succession = yes
			add_character_flag = cadet_branch_created
		}

		revoke_allowed = {
			always = no
		}
		ai_will_do = {
			factor = 1

			modifier = {
				factor = 0.1
				OR = {
					is_landed = yes
					is_independant = yes
					AND = { has_trait = kinslayer
						NOT = { has_trait = legit_bastard }
						NOT = { has_trait = bastard }
					}					
				}
			}
		}
	}
}

Any ideas? Otherwise I will just go with a random dynasty....
I only really mod in my spare time just to see what I can. I can't seem to make this work though... don't know what I am missing.

I think that a decision like this would be excellent in the game as quite a few cadet branches became prominent (the Plantagenets for example).
Perhaps an idea for the next update???