Update for anyone curious-
I bought and installed the X Clamps. It's been a week now and its still working. I noticed the fans run faster now, probably because now REAL thermal paste has been added, the right amount of heat can be dissipated.
I did notice though, when I first turned on the Xbox after the mod...I got the lights, as expected. But I got 0100 instead of 0102. 0100 HAS to be GPU memory. So I'm thinking on my unit there was a cold joint in the GPU, and something was up in the VRAM. So possibly in the future the memory will fail. Then I'll try the penny fix.
Anyone have any questions on Xbox repairs? I did a lot of research on this recently.