Assembly of this project is pretty straightforward. Most of special instructions revolve around the RGB shield assembly. Because the Metro M4 Express Airlift is still a Metro M4, you will need to cut one of the traces and add a wire.
You can follow assembly instructions for the RGB shield in our 32x16 and 32x32 RGB LED Matrix guide.
To assemble, you will want to start by adding the heat-set inserts into place where the Metro M4 Express Airlift will be mounted.
Carefully line up the Metro M4 Airlift onto the heat-set inserts. Make sure the power jack is able to go through the hole. It's a little tight, so you may need to use a sharp knife to carve away any excess filament.
Once you have your RGB Shield soldered up, connect the power wiring harness to the screw terminals on the RGB Shield.
The RGB Matrix Panel works by using the special magnetic screws that come with the panel to magnetically stick to the wall mounting screws. You may need to loosen the wall mount screws a bit if it's not sticking well in all four corners.