so I finally went ahead and did this too, but I kinda don't feel much of a difference, maybe even more heat than before.
after having to take it apart one more time, having forgotten to reconnect the battery before, i tried idling a bit in mario maker and then moved on to BotW and its definitely very warm to the touch, first only on the side with the card reader, but after a couple of minutes, all over the back and front like always.
i didn't go so far as to remove the metal heatsink to reveal the ram chips, i attempted to go there, but it felt like it'd bent and break off so i let it be.
i cleaned everything that had grease on it with 99% isopropanol, i took out the copper sheet and put mx-4 on the cleaned die in what seemed to me like a thin and even coating using a plastic spatula.
i put a 1,5mm thermal pad over the ram area and put some more mx4 on top of the heat pipe instead of using more thermal pads (maybe that was a mistake? it couldn't be that instead of moving to the fins, most of the heat is transfered into the casing now?)
after having to take it apart one more time, having forgotten to reconnect the battery before, i tried idling a bit in mario maker and then moved on to BotW and its definitely very warm to the touch, first only on the side with the card reader, but after a couple of minutes, all over the back and front like always.
i didn't go so far as to remove the metal heatsink to reveal the ram chips, i attempted to go there, but it felt like it'd bent and break off so i let it be.
i cleaned everything that had grease on it with 99% isopropanol, i took out the copper sheet and put mx-4 on the cleaned die in what seemed to me like a thin and even coating using a plastic spatula.
i put a 1,5mm thermal pad over the ram area and put some more mx4 on top of the heat pipe instead of using more thermal pads (maybe that was a mistake? it couldn't be that instead of moving to the fins, most of the heat is transfered into the casing now?)