I picked up this Hotwheels "Bat" speeder from Batman to use as an air speeder for my Hell Knights army. The cockpit area is just barely large enough to be considered for a 28mm scale pilot but I may paint over it anyway and just use this thing as a kind of drone. I think either would work reasonably well for this design. One weird thing about the toy is that the army mounts are positioned asymmetrically which isn't so bad because they are clearly designed to be able to sweep back and forth to track targets. It does come with a flying stand which is nice but it is awfully short for an air speeder type craft. I will probably upgrade it eventually.
Another thing about that model that is kind of strange are these roto blades on the bottom. They are however made of soft plastic so they were easy to clip off.
This is a pretty good model as is. It's a bit on the Iconic side of things but I think painting it up in Hell Knights cammo will make look different enough to make it work. I may add a missile launcher above the cockpit areas to change it up a bit and add a bit of fire power but that's something I can do anytime or even as an upgrade.