just finished the whole process and finally got it to work. By far the hardest part was getting the #2 ribbon to snap back in & know where to place the #3 ribbon. Just trial & error, and it finally worked.
FYI. Instead of using a spudger I gently pulled the glass top from the bottom (after I had removed the 2 bottom screws & gotten the 2 pieces separated) & ribbons 1 & 2 just popped out. I thought I had broken or torn them at first since I didn't see that might happen. I had that 'oh crap' moment u get when something happens that's not specifically mentioned in the directions.
at first when i put it all back together after the glass was replaced it came on and the home button worked, as did the on/off button & sound. But could NOT use the touch screen. So I had to figure out how the 3 ribbons worked. The #1 ribbon snapped in without a problem, but I had to keep sliding around the #2 ribbon and pushing down gently until it felt secured.
A suction cup is the best way to get the glass off the casing. I had a pry tool but didn't need it. This job is not easy & is not for the faint of heart.