70C on Prime95 for a i7-930 is about what you would expect. It's a 'OK' result as are the idle temps. And your gaming temps should be lower.
My suggestion is to not attempt to force the screw.
Get advice from the CM support forum.
I think you give wise advise WR2. I will not attempt to remove it. The temps are fine the computer works great, I will leave well enough alone. If it ain't broke don't fix it. I will learn from my mistake and next time not go crazy with the screw driver.
If I notice an upturn in temp I will call CM. Take care buddy