hi, I tried to open my iPod touch 2G as I wanted to replace the power button (mine was broken and I got a replacement from ebay). Suddenly the screen cracked... I think I pushed too hard in the edges of the screen. It works but has a very long crack in the middle. I want to order a replacement digitizer from ebay (10$ chinese). my question is-will I feel any diffrence between the current screen and the chinese? I mean- any sensitivity or calibration problems? Of course geniune screen will be the best, but I don't want to pay so much.