Double Shower Adapter

Loved the idea of the [tandem shower by boona](https://boona.com/products/tandem?variant=44288344326367), but didnt want to spend $250-300:

[Shower curtain rod, $16](https://www.amazon.com/dp/B0BZPRCGR3)
[Extra shower head, $15, best to match flow of existing one](https://www.amazon.com/dp/B07DRCFF9P)
[60in shower extension, $15](https://www.amazon.com/dp/B0CG97ZN5V)
[splitter/selector, $10](https://www.amazon.com/dp/B09QHQ6Y5K)