Being able to use your own drone 3D model could be really nice and add more variety in game :)
It'd also allow to have "drones" that could be animals, robots or such too for example :)
An easy way could be to check for the presence of a special unity object named "drone" in the avatar's hierarchy.
That way it doesn't require complicated things like introducing new drone polygons limits or such,
as it'd be already part of the avatar and so counted in the existing avatar limits.
Simple logic could be that If such a node exists, then load / replace the drone model by the 3D model under the avatar object to display as a drone.
(scaling it down eventually to fit / attach it to the drone "hitbox" and respect the current existing drone physics. )
Being able to have a different model per avatar would be super versatile,
like if you have a dragon avatar, the drone could be a little dragon flying around and so on :)
That would really be neat and add variety and also allow us to finally "fly" in game with a mini avatar / drone of our choice ;)