Blueprint casting of AnimNotify - To trigger jump?

I’m trying with no luck to get an AnimNotify to cast to CharacterBP where I can use it to trigger a height increase.

The idea is that the location of a set of wings mid animation can increase the character height as they push down.

I’ve tried everything I can think of and consulted many tutorials with no luck.

I can get the animation to PrintString while simulating the AnimBP, however the string doesnt trigger when manually triggering the animations in game.
I suspect my problem may be something prior to the casting but any info folks can offer or alternatives would be muchly appreciated!