#height-padding-toggle').is(':checked') || h_pad == '') {
                $('#height-padding-toggle').prop('checked', true);
                $('#height-padding').show();
                $('#height-padding').addClass('ui-state-error');
                $('#height-padding').siblings('.error-msg').append('<div>Height padding is required and must be a numerical value for a Sandwich case so there is space to put the mount holes.</div>');
                error_els.push('#height-padding');
                has_error