Prototype 04 was the first one that did the whole job on its own: download, predict, filter, chime. It had a cardboard back panel and a tube borrowed from a scrap oscilloscope.

At 22:39 it chimed. At 22:41 the station came up over the warehouse roof, brighter than anything else in the sky, and crossed in just under five minutes. Nobody said much. Then Tomas went back inside to fix the timing, because the chime had come 40 seconds late.

What changed after

We moved the prediction step onto the set itself rather than a phone, added the 20-degree rule and started work on the shell. Prototype 04 still sits on the shelf above the workbench.