If I buy the Egrips Wrapback for my Sprint Treo 600 can I also use the Fat Sides to completely cover my phone? Or must I use the thinner Standard sides? Emailed Egrips with the question but got no reponse. Their site says the Fat Sides are for the raised silver sides that I have with the Sprint phone. I just want to be sure that the Fat ones will fit with no overlap when I have the Wrapback installed. Thanks for any ideas.