ive done about 3-4 reflows on mine so far, and let me tell you, dumb as it seems the oven method is easiest to perform and has had the best effect! first couple of times i used a pen torch and lazer thermometer, which is a pain in the &@!. you have to be really good and experienced with this kind of work- hold the torch close enough to transfer the heat well, but not too close so it doesnt keep going out, move it around so not to heat one spot, but not too fast either, coordinate this with taking the measurements using the gun in your other hand.. you get the idea. theres a video of a repair shop doing this on youtube, according to them you have to heat it to just over 200 celsius for it to work, and thats &%%* near impossible with a tiny torch. i got it pretty close after a good 5-10 minutes of mucking around with it, but even then parts of the chip were cooler while others were hotter, its really hard to get it even. despite this fact it still worked for a couple of months each time but then quit on me after. then i lost the thermometer and my torch lol. so i threw it in the oven. 210 celsius is 420 farenheight, i thought that was pretty funny ;) couple of weeks later it quit on me again. i repeated this over, except that time i forgot the #!&# thing in the oven for like 10-15 minutes, instead of the 5 minutes i did for the first time! well sometimes mistakes lead to the greatest discoveries lol. some of that black film that is stuck on to places curled up and melted but otherwise nothing happened. these things can really take heat! i put it back together and have been using it for over half a year now with no problems. my conclusion to all this is that it only works for a limited time because most people do not get it hot enough or long enough for the proper effect to take place, and the heat does not distribute evenly throughout the whole chip and all its connections. which of course is understandable as nobody wants to screw up their machine, even though its already screwed up to begin with. i used to be the same way, but through all this learned to stop fearing losing that stupid motherboard, seriously whats the big deal, its already broken!