What are y’all’s most over-the-top designs?

Hi, I was wondering what y’all’s most excessive designs are. I’m talking things like a 600 meter long craft or an Armor scheme that isn’t practical but isn’t being penetrated either, things so absurd that it is relegated to “how far can I push this, and will the engine break before I do?”

For me, it is the aforementioned 600 meter long ship, meant to be the pinnacle of “if I could afford it, it would be unstoppable!” I’m talking so many weapons I’d realistically need either more channels or dedicated AIs for the larger weapons, Armor that barely floats, but is damn near impossible to break, a whole squadron of drones, and other miscellaneous that-ain’t-cheap’s, and honestly, I want to see how else I can bring my computer and my sanity to their respective knees

Edit: no one asked, but I’ve decided to call the ship I’m currently building the heart of iron. I may or may not edit my comments to use that name, but I will use that name in the future