hey, im wondering if you can use the incase slider with the zagg full body coverage? i have the ncase slider on my 1g itouch and it leaves scratches from the case?? wonder why... the case is super tight so i am not sure if it going to work with the shield... i am buying the ipod touc 4g in september and i want to get the invisible shield. and the incase slider(for drop pretection) should i get the screen only, or should i get the full body protection if it works witht he incase slider? stops all stractes on my ipod... thanks!ps does the new incase sliders for the 3g ipod touch leave the abrasion on the ipod?