If you are using the Free Shipping Options freeoptions shipping module, you could customize the code to allow setting of 2 conditions, one being total >= 300 and the other being weight <= XXXX
This can be done by altering the final tests on the module from OR to AND connectors ...
PHP Code:
// final check for display of Free Options
if ($this->ck_freeoptions_total or $this->ck_freeoptions_weight or $this->ck_freeoptions_items) {
$this->enabled = true;
} else {
$this->enabled = false;
}
Bookmarks