MobileWill shared his project USB LED Matrix controller board in the project log forum:
I displayed some projects next to Ian at the World Maker Faire Dangerous Prototypes booth, and I’m working on turning one of those projects into an Open Source Hardware product. I’m building a USB LED Matrix controller board and one of the goals of the project is to be able to mount multiple displays next to each other to form a wider or taller display. I’m having trouble adding mounting holes onto the board in a spot that won’t interfere with the LED Matrix display, or add a gap between adjacent displays.
Via the forum.
what about making each board 2 displays wide, then the vertical connectors could live between the 2 displays