I'm hoping the leaky shower valves just need a quick repair: take them apart, replace rubber seals, it all works.
Complicating factors: I don't know the brand or have replacement parts, so I'm planning to take the valve guts to the hardware store to find the right replacements. The fixture might be original to the bathroom, and is definitely old, maybe 1950s, but I'm a bad judge of plumbing age.
It counts as a Damn Project if I need a third trip to the hardware store, the shower is non-functional for more than 48 hours, or I have to cut any pipes.


Update 2025-12-27 (PST) (AI summary of creator comment): Calling in a professional will count as a Damn Project (resolves YES). The creator expects this would only happen after meeting one of the other listed failure conditions.