A bit more converting done and now I have finalised how I will make my "drones"
Rough storyline I am working on is that my army will represent a test Cadre where Fio cast from the Farsight Enclaves (far away from the restraints of the Etheral caste) are building advanced AI Drones to bolster the Enclaves forces.
I've gone with a very much Geth inspired anthropomorphic drone, which *may* have been influenced by Necron technology...
Busines end of the sniper rifle and showing the single large photo receptor which will be the signature design feature of the drones
Sniper Drones are "Jet Pack Infantry" so the tau Fire Warrior shoulder pad makes a good jet pack cowl, under which is a Fire Warrior grenade pack which looks like small vents
Overall now I know how to build them they won't take too long. Just need;
17 more Sniper Drones
6 marker or missile drones
2 shielded missile drones
2 shield drones
So a wee bit of work to do!