How to transform an actor into a different actor

So basically I’m trying to turn a sphere actor into an arrow asset that I’ve added and modified inside unreal. My end goal is that the sphere will switch to a different arrow up/down/left/right depending on a random int. I will settle for just some help making the sphere actually turn into the arrow though.

So I found this video - YouTube which is what i want to happen pretty sure however every time i hit f to spawn the arrow it doesn’t spawn and i get an error message saying "LIGHTING NEEDS TO BE REBUILT(n unbuilt object(s)). N being how many times you hit f. Updated blueprints editor.

I figured it out. You can’t use the entire transform just the position… I’m a newb. In cases any other newbs need help.