Help with Foundation layout

I’m quite new to Foundation, and have nearly got a home page layout as I would like.

If anyone could help me out with a couple of tweaks that would be much appreciated.

The page is here:

I can’t seem to figure out how to reduce the gap between the ‘Meet the Experts’ panel and the ‘Lectures’ panel. (I did try by changing the widths of the grid, but I think that was a big no-no and messed everything up on mobile devices.

Also - how can I lose the left margin on the Tickets panel and the right margin on the Get Here panel so that the two of them line up with the ‘Meet the Experts’ panel above?

Many thanks for any pointer.