The left fan started making noise constantly.
The repair went pretty smoothly. One of the metal tabs on the case broke off so that case screw couldn't go back in and another case screw just wouldn't go back without stripping. Also, took several tries to get the top back on the case. The tabs just didn't want to go in. Pretty happy with the way it went. Took a while but it was worth it.
Don't really have any advice other than patience. Lots of patience.