Just like to add an update to the post I wrote yesterday so today after a few minutes fighting to get the flex to sit rightish as the flex is clearly a different lenth and width to the ipad 4 digitizer ..
Got screen fitted and now there is dead spot on screen not that worried as this was a test just to see could it be done and my opinion is don't bother just buy the correct part for the ipad generation you need it will save you time and heartache