Oof... I tried poking around on a listen server for comparison, and unless client-side entities go unreported/undetected even on a listen server, then yeah, I guess there's no entity behind it... I guess that means it's all handled by the player entity, somehow?
I did a bit more playing around with m_iAddonBits, and I've at least determined that 64
is what makes the defib-sans-paddle model attach to the player's back, but it doesn't seem like I can do much with that knowledge...
I guess I'm going to have to approach this the hard way, then. When I was Googling to see if I could find anything useful, I stumbled upon
this post. I figured it wouldn't hurt to give this a shot in-game using cheats, so I did, and:
It's a start, at least. I guess that makes my next question something a bit more simple:
Can I add an offset to an entity's angles via a plugin? I'd certainly assume so, but vectors aren't something I've really tried touching yet.