WS2812 LEDs are wired for every stage first. During the printing process, a color change at 5 mm halts the printer and the LEDs can be putted inside the holes of the print. also the cables were placed in the channels.
The following picture shows the cabling from a test piece, I did during concept development:
After putting the LEDs inside and changing the filament, the LEDs are "overprinted":
This procedure is done for all four stages.
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