A bracket to join 4 led matrix panels (32x32 leds; 4mm led spacing) together to create a 64x64 panel.

Holes are 3mm on the bracket; you can drill the holes to 4mm to give you some flex in aligning the gap between the panels. Mounting in a U-loop (U-mapper) pattern or as a straight matrix are possible.

Print at 0.2mm layer height should be fine. No specials like support needed.

LED panels used in this build: PH4-16S2M2121-v1.1; 32x32 leds; 4mm spacing