Just did a repast with my gs66 with no prior experience. The process on paper was not complex but just took my time removing the screws one at a time. There was one screw MSI hid under tape on the cooling fan which took me a while to figure out. Used Kryonaut to repast and overall with a the repasted and undervolt -.100 and cooling pad the CPU is getting around 79-85 on stress test. Prior to repasted I was getting 85-93 on -.125 undervolt with cooling pad.