I just preformed the screw through method tonight on a defective unit that I had gotten. I tried cleaning it, heat gun, etc to try and stop the 3 ring of death. Wouldn't work. Found this method, went and got the parts and presto fully functioning 360.. It really is amazing that something that is so simple could fix this problem. I also modified the fan shroud and ordered a tailsmoon whisper fan. It can only help! I then went and rented call of duty 4 and played it for about an hour with no problems whatsoever. Also, both fans seemed to be about the same temp. which is a positive.
Thanks,
Stan