Eruption's addons are not symmetrical

The floor patterns (made of waxed oxidized cut copper blocks) in the following addons are not symmetrical:

• eruption/quadrant_1
• eruption/quadrant_2
• eruption/quadrant_3
• eruption/quadrant_5
• eruption/slice_1
• eruption/slice_2

The walls in the following addons are not symmetrical (one end is made of copper blocks while the other is made with tuff bricks):

• eruption/quadrant_1
• eruption/quadrant_4
• eruption/quadrant_5

This is likely not intentional as quadrant_5 reuses quadrant_4's floor pattern.

These both lead to odd patterns on the floor and the walls.