ETC LIGHTHACK BOX 1 Assembly Instructions Manual page 8

21. From the underside of the lid, use a file to bevel the edges of the square holes. This makes
the plastic surrounding the hole thinner so that the Cherry MX Red switches can clip in
properly.
TIP: It may be helpful to
trace the edges of the
square holes into the
plastic with an X-Acto
knife, and then remove
the paper.
8