I made a clock based around my time and my life. The project is documented over here. After living with the clock for some time. I just can't deal with it anymore. It's too ugly. It was a prototype and it was great for that but I now find I want a product (not a first attempt). So I'm updating the design and going to attempt to productize it.
So first off, I bought a 24 hour mechanism and checked that it would work with the one hand. Some mechanisms don't I discovered! Next would be the trip to canal plastics.