Ok, blueprints and event dispatchers is the way ( or one anyway ). I can rotate a whole ship side of cannons towards a target point without any frame hit whatsoever:
There is an actor BP in the scene, which tells the cannons where to aim. Right now, I’m just aiming at the origin:
and the blueprint picks that up like this:
I’ve just realized, this only lets you point all of them in one direction. But it demonstrates something… 