I'm using Susy within the Omega 4 Drupal frame work and have been having trouble getting the gutter width to change from the default of 1em.
What is really odd is that the background grid responds changes to the gutter width but the elements on the page that are using span-columns keep the 1em gutter width. The compiler as well isn't throwing up any errors.
My susy grid settings are below. I've cross posted this as well to the Drupal Omega page as well. Thanks
// Set consistent vertical and horizontal spacing units.
$vert-spacing-unit: 20px;
$horz-spacing-unit: 2em;
// Define Susy grid variables mobile first.
$total-columns: 4;
$column-width: 4em;
$gutter-width: $horz-spacing-unit;
$grid-padding: 5px;
$container-style: magic;
$container-width: 1900px;