I wouldn't allow an Hs 129 even if it did count as a self propelled AT gun! (I want you to cut off both wings in that case though) Why? Because it's ugly! That's why!!! And don't you dare to talk back!!! Yeah, I said it! It's ugly! What are you going to do now?!!!
Just kidding. Any kind of plane is a no-go here. I think the 129 is ugly, but it looks cool at the same time! (maybe it was the inspiration for the A-10?)