I don’t have that project still loaded up so sorry, no screenshots. It’s also been practically a year.
Mainly the attachment point itself needs to be attached in order to follow something and I found that I could only do this if I attached it to another skeletal mesh. If I did it with a staticmesh, the position wouldn’t update when I moved the object around. So the answer is to make whatever you need to stick it to a skeletal mesh.
I wanted my character’s hand to stick to a spinning obstacle when you held the button. I was trying to just rotate a staticmesh and stick the hands to that. It didn’t work at all. The object spun, but the hands stayed where they were at the moment of attachment. As soon as I changed the obstacle to be skeleton animated, the attachment followed along.
It was overhead that isn’t officially necessary. There’s no need to use bones to rotate an object under normal conditions.
This may or may not have changed since then. My project was in like 4.4 or 4.6 or something.
Hope that helps, but I can help you further if you add me in Skype. Just make sure your intro message isn’t default because I get spammed and refuse all of them if it’s not custom. Put “UE4 Answerhub” somewhere in there and it will remind me.