nitin_g3
Guide
That is a topic of varying opinions, most people say, tight them as much as you can, I've see people using washer under those spring screws. On the other hand few people say leave them a little loose.If you strip those itty-bitty screws while overtightening then you are in for a world of pain.
I, myself think that tightening them well makes more sense, because you're basically making the contact between heatsink and die narrower. And if there are uneven places on heatsink, thermal paste will take care of them.