Well, I decided, when I wanted Tau allies, I wanted my Tau to look slightly different than normal Tau. Specifically, for my broadsides I wanted to give them a personal touch.
I 3d model as a hobby, so I came up with a design, and got it 3d Printed. Here is the fruit of that labour:
The weapon is symmetrical, so it'll go on either arm.
I'm planning on throwing together a new missile pod, and then possibly taking a stab at doing my own shield drones. Hopefully every element in the army will have a slightly custom look to it.