| I have the Medtronic Minimed Paradigm pump and have used it for about 2 years. I'm a loyal Medtronic customer and have been for 8 years now, upgrading as the technology gets better. Maybe you should give their products a try. I have had very few problems, and if I have trouble, or just a question, their help line is great - and they don't make you feel like an idiot and are very polite/respectful.
Also, I don't know the Cozmo, but have you tried other infusion types? It could be the length of canula, or you may need another type of set that has a different way of actually connecting to your skin. | 
