Unity Shooter - Simple drone design

So I thought I'd take a small break from all the programming and do up a very, very simple drone idea I had for my shooter, since I've got to have various enemies to deal with and will be having a bit of stealth mechanics in place thanks to the line of sight code what better thing to build than a small alien drone?

So I decided to get sketching and I came up with this in photoshop.

As you can see, very simple sphere design, perhaps if I want to I'll do a more complicated drone in the future but this will do for now just to have a nice visual that isn't a capsule to look at. I then after doing this concept art went and did a mock up in Maya and created the 3D model. Importing 3D models like this in Unity is very simple, literally just a case of drag and drop however I need to double check how to get the navmesh agents working with floating enemies like this. Even though it's above the ground it won't be very maneuverable so I should still be able to get away with using the standard pathfinding and movement that Unity provides.

Once I do all this, I'll show you the little drone in action, I already have that blue light on the top of it's head slowly flashing and what I'll have next is make it so that a cone actually shoots out of it's red eye that you can see so you have a visual indicator of how far the line of sight goes on it like in all those stealth games where you avoid spotlights and so on.