The newest design from Floating Castle Robotics is loosely based on a WWI fighter plane and the battlebot Crossfire from King of Bots. I added some checkered patterns, such as were common on aircraft of that era, and spoked chrome rims. The battlebot itself is an unusual type known as an x-axis or 'face' spinner. It's mostly done for fun. Initial work in TinkerCAD (~8 hours). Rendered in sketchfab.