Attach four solenoid motors to the back solenoid mount with M3 screws and nuts. Leave the solenoid on the right end's top mounting hole unattached.

Attach one of the columns to the back mount with an M3 screw and nut. The screw should go through the last solenoid's mounting hole.

Attach four solenoid motors to the top solenoid mount with M3 screws and nuts. Leave the solenoid on the right end's top mounting hole unattached.

Attach the second column to the front mount with an M3 screw and nut. The screw should go through the last solenoid's mounting hole.

Attach M2.5 standoffs and nuts to the electronics mounting holes on the electronics mount.

Use three 20 mm long M3 screws to attach the electronics mount to the front solenoid mount. 

Use M2.5 screws to attach the Metro RP2350 and solenoid breakout to the M2.5 standoffs on the electronics mount.

The two solenoid mounts allow the solenoid motors to nest together. Both solenoid mounting plates are held up with the columns. 

Slide the two mounts to nest the solenoids while inserting the ends of the mounts into the columns.

Use M3 screws and nuts to each solenoid mount to the columns.

That finishes the assembly! Next up: wiring.