So I bought a pack of CE Carts from SI. I love them right out of the pack and wrote it several times on here. Well that is I liked them till I opened up my 3rd, 4th, and 5th ones. It started out as a bad week, I lost my drip tip that comes with it and SI doesnt sell them seperate. And then I opend up those 3 carts and they were duds. I hope that if I choose to buy more that they are not duds.