We have just ordered 125 custom PCBs for the WS2812B LEDs on PCBWay.com. For the previous prototype we just cut an LED strip into 114 pieces, glued these onto a 3D printed panel and connected them again with wires. Since each LED needs 6 connections, the preparation of all wires (cutting, stripping and tinning) and soldering them took a huge amount of time. Now we will get preassembled PCBs that include JST connectors for easy wiring.

Eagle and Gerber files for the PCBs can be found on the linked GitHub page.