Insert 8 M2.5 screws into the mounting holes at the bottom of the 3D printed case.

Insert the FeatherWing Doubler over the 8 screws and secure it in place with 8 M2.5 nuts.

Plug in the Feather RP2040 and MIDI FeatherWing into the FeatherWing Doubler.

Attach the OLED display to the cutout on the 3D printed lid. Secure the display with M2.5 screws and nuts in the mounting holes.

Place the washers on each of the rotary encoders to prep them for mounting.

Insert the rotary encoders into the mounting holes on the 3D printed lid. Breakout 0 (0x49) should be at the top and breakout 3 (0x4C) should be at the bottom.

Secure the rotary encoders with the included nuts. Close up the case by attaching the lid with M3 screws into the mounting holes in the corners.

Finish the assembly by attaching knobs to the rotary encoders.