The theme development forum was created to aid those who are developing themes for Drupal. This forum is not for issues you may be having with contrib themes. Issues with contrib themes should be placed in the issue queue of the theme in question. Please respect this.
If you you have drupal installed already and are seeking a theme, have a question about a specific theme and what it does or if it will fit your use case, please place your questions in the Post installation forum.
I want to get more control over the bootstrap classes on aside(s)/main content container.
bootstrap/themes/system/page.tpl.php has the aside classes hardcoded (col-sm-3) and in bootstrap/themes/system/page.vars.php there is logic that adds a class to the main content container depending on whether there is one sidebar, two sidebars or no sidebars (col-sm-6, col-sm-9, col-sm-12 respectively).