As requested, I created new models for a WS2812b strip since the individual LEDs were too time consuming to solder. This is a fairly basic template for a word clock, and right now it doesn't include any stand or electronics box.
The LED strip I used has a spacing of ~16.61mm between the LEDs, and has adhesive backing. This clock is designed so that the strips can be cut into lengths of 10, stuck to the channels in the back plate, and then the whole clock screws together with 4 M3 screws. On the light divider, the chamfer should be enough to allow room for soldered wires to fit inside the clock with plenty of room, and there are holes going out to the back of the case for arduino connections and the like.
I have not tested the design, so if you print it and find an issue - let me know and I'll fix it as soon as possible.