You don’t need any Pads nor Thermal Paste, as mentioned before. The Liquid Metal is applied as a Pad+Barrier Assembly beneath the Cooling Solution. I removed them recently. There are more and more Users complaining about the Fw16 not beeing properly cooled as it runs really hard into the Thermal Limit with pretty wide Temperaturedelta between individual Cores. I got a Replacement Mainboard with the Cooling Solution preinstalled with better Performance, but still not in Line with what the 7840HS should have.
I suspect a Quality Issue with the Phase Change Liquid Metal, because after i replaced the Liquid Metal with PTM7950 my Tempdelta was less and my Performance even higher. You can see Pictures in the Batch20 Thread