Just a quickie.
I’ve said before that, when using the Demekin, you have to be careful of your horizons. This being a fisheye camera that’s really tiny, it’s easy to get your horizons off. To mitigate this, I bought an el cheapo level and doubletaped it to the top of the camera with the viewfinder as an added anchor point.
Easiest mod in the world. Total cost, 50 cents.