Hi guys. I just did it ! I would not describe it as super easy, but thanks to the screw template provided file, even the now famous pressure contact can not be lost ;-)
I just wanted to comment, not only to praise iFixit (and myself), but also to mention two side effects I had to overcome:
-First, when finished, the power button did not work (I had to plug the Dock Connector to start the phone). As I the power button is not so far from the rear camera, I figured out something went wrong in the reassembly. Since I had just done it once, I thought I could do it a second time, so I removed the newly assembled camera and reassembled it with extra caution. At the end, the power button worked as expected.
-Second: each time I restarted the phone after reassembly (twice, then), the SIM card would not unlock after the PIN code was entered. I had to remove and reinsert the SIM card for the PIN code to finally unlock it.
Otherwise, everything went smoothly, thanks again to the iFixit guys !