Ah, I remember ...
... developing slide film in the bathroom, after fiddling under the duvet, with a bucket of warm water as a temperature control bath and a small bucket of very hot water for topping it up. It's very easy if you keep to a procedure and I had good results from the first attempt. I thought they were good anyway.
I used to take stereoscopic picture pairs and viewed them in two small hand-held viewers fixed side by side with a piece of foam rubber betwen them to enable fine adjustment.
I've thought about trying that with my digital camera using two pictures side by side on the screen and using the cross-eyed technique but never got around to it. Has anyone done that?