Change width of new Mosaic Galleries to fit Full Width Page Template

Hi,
I am wanting to add a gallery page on my site. I want to use the new Mosaic gallery and use the Full Width page template.
Unfortunately I cannot find a way to increase the width of the gallery – it still only takes up half of the page (leaving room for the sidebar, even though there is no sidebar in the Full Width template). Is there a way around this?
Thanks!
Here is the page: http://vohafrica.com/bringinghope (I would like the gallery to fit nearly the entire width of the page)