Setup laser physically

Take the spacer from the bottom-left of the enclosure.

The spacer's proper place is at the front-left of the enclosure.

The spacer in its proper place

Take the spacer from its proper place.

Take the spacer from its proper place.

Place the spacer between laser and material

Place the spacer between laser and material

Loosen up the laser so it can slide up and down, by unscrewing it a bit.

Loosen up the laser by unscrewing it a bit

Slide the laser down, so it rests on the spacer.

Slide the laser down, so it rests on the spacer.

Tighten up the laser again by turning its screw.

Tighten up the laser again by turning its screw

Remove the spacer

Remove the spacer

Place the spacer back in its original spot

Place the spacer back in its proper place