Not terribly sure I do love the simplicity of your setup but it requires modding the actual heat sink as you know. My plan is to engineer a piece that would require essentially zero mods and would just bolt into place. Although this setup requires more planning, design work, and cost. So the plan is to run a controlled test this weekend with just copper to heat sink tests fanless and see what kind of temps I get with 45W TDP. If its acceptable I will roll forward with my original plan. I am still trying to find someone with a CNC machine capable of cutting copper that will run off prototypes for me for nominal costs. Most actual companies that do that work want a $500 minimum purchase. Which that isn't out my realm I don't really don't need the most expensive part of my build being the heatsink
I assume it will be acceptable. I ran with JUST my copper plate the other day and I was able to keep the temps around 55C for about 30 minutes. After that they started to rise. This was doing normal work and Geekbench testing. Not prime95 tests.
