I read about the intended deflection. I know I know, can't know more than the designers who made the darn thing. I do not believe that it goes to a flat plane. The paste residue was always heavy around the center which means it always was never achieving a flat plane (perhaps because it was not designed to be used with paste?) Clear marks made by the edges also, to the point of marking the base so definate load was at the edges, not just a balancing act. Have not noticed a detrimental effect. The pressure of the PCM, now that you brought it to my attention, bothers me. I think I will sand the edges down now that you have enlightened me

Did that engineer mention anything about how many times it could be mounted before the phase change material looses function? And also is the 40F offset including the PCM of the stock HSF also (it's used there too)?