Just got first lemon lime soda in mail. The directions are for carbonating with yeast, but I'm force carbonating with keg. Is there a different amount of sugar I should be adding than the directions? It's this soda http://www.austinhomebrew.com/product_info.php?products_id=11086&osCsid=4259b851 5674f632cda5097a40449fc8