What's the design you made you're most proud of?

What's the design you made you're most proud of? For me it's this geometric puzzle/fidget. Its - the most complicated fidget/print in place design I've made so far. It took so long to get everything right to get this to be able to print in place with limited supports that are easy to remove! But it's so satisfying to use. https://makerworld.com/models/1198666