We now have 20px on each side, so actually these values should all change. Sorry I did not think of doing that when modifying the grid.

- BASE 8 columns = 620px + 20px*2 = 660px
- MEDIAN 12 columns = 940px + 20px*2 = 980px
- EXTENDED 12 columns = 1020px + 20px*2 = 1060px