Free spinning could be implemented with a slip ring, which transmits power while allowing rotation. Here’s one on Amazon, I’m not recommending it but figured an example might help. example
I’ve used them at work for measuring sensors or gages that had to be mounted onto rotating machinery, like a fan. You could definitely get one that handles euro power.
Too funny, there’s a company named Moog that makes them: https://www.moog.com/products/slip-rings.html