That is true. More skulls would fit in with the theme.

[He manages a flicker of a smile in her direction at the shoulder squeeze. It doesn't quite reach his eyes, but an attempt was made.

He welcomes the change of topic, turning to pursue the instructions. ]

Okay, so we need to make sure the smooth parts are on the inside the screws should have a corner part to them, so they fit two pieces together at once.