I just broke the bumper cover while following steps 14 and 15 - the guide failed to mention the little plastic posts that actually press the RB/LB buttons are easily snapped while using the spudger to pry the bumper clips. The posts are visible in the picture for step 16 - the long protruding parts nearest the centre of the cover. Maybe consider adding a warning. I'm going to try to glue the posts back on but otherwise will have to just buy a replacement bumper cover part. Excellent guide otherwise.