Everything went fine, but you need patience!

crwdns2853023:0crwdne2853023:0

The trackpad was jumping and selecting automatically what was displayed on the screen. Also from time to time it used to click by itself ... very annoying.

crwdns2853024:0crwdne2853024:0

It was the third time I did. First time, I did it easily taking lot of time but the trackpad I bought was not running fine (the keyboard was not fully working, only part of it was working). For the precision, this first one I did not bought through ifixit. Second time, I decided to place the old origin unit back ...

Then I keep working like that for another 6 months. Then I decided it was not possible to work like this and bought a trackpad from ifixit ... double the price of the first unit. This time it worked!!!

crwdns2853025:0crwdne2853025:0

The more you play with all these screws, the more they got "tired" ... the third time I wanted to open it, some screws were so "tired" that it was not possible to unscrew them with the P5 tool bought at ifixit.net. I finally went successful by using another tool provided also by ifixit but it was a little bigger so that I was able to unscrew the "tired" screw. Another tip is to scotch every screw on a piece of paper as you go through the steps, so that you dont loose these screws.