Vantage is a bit tougher. Please try:
add_filter( 'siteorigin_panels_theme_container_width', function( $container ) {
return '1080px';
} );
add_filter( 'siteorigin_panels_theme_container_selector', function( $selector ) {
return 'body.responsive.layout-full.siteorigin-panels #page-wrapper .site-main .full-container';
} );
In your Custom CSS, please try adding:
.layout-full .panel-row-style.panel-row-style-wide-grey, .layout-full .wide-grey.panel-row-style, .layout-full .panel-row-style.panel-row-style-full-width, .layout-full.panels-style-force-full .panel-row-style {
margin: revert;
padding: revert;
}
.siteorigin-panels-css-container #main {
padding-right: 0;
padding-left: 0;
}