Judge's X360 is revived. He just went back from my hse with a happy face. (samurai20, PoP and metalgrind also came). Actually metalgrind already managed to fix his X360 with the hotgun method and I just replace the x-clamps with the screws and washers. I'm really happy that Judge can now continue enjoying the LIVE session.

The problem is not the thermal paste but the X Clamps design itself, by replacing the x clamps (which flex the mainboard) with bolt and washer this problem is eliminated.

Actually there are two methods on replaacing the x clamps. One without drilling the case and one method you have to drill the case. Mine was the first method. Maybe I'll do the second method which involves drilling the casing to permanently secure the both heatsinks when I have time.

I've tested my console for another 3hrs straight session. So far so good.
I'm hoping that this fix will last quite long.