3D render of the front of the LED PCB mentioned and described in previous posts. Small black round PCB with 55 white square LEDs on top. The gold pads on the MCU PCB can be seen peeking out of semi-circular half holes on the edge of the LED PCB.
https://cdn.masto.host/ledssocial/media_attachments/files/112/072/752/381/560/828/original/023e5f5cf36228f4.png