Dudes about thermal paste....
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I used galium based "liquid metal" for computers as core of the heatsink is copper but trying them out on the 3d printers with aluminium parts is a bad idea... no I heard that mosquito comes with plated copper and steel parts so no aluminium there, also I know there are copper heater blocks for e3d and non copper / brass nozzles so it might work there too .. anyhow, if there's aluminium the LM compounds are dangerous, if it's copper they are best conductors compared to everything I ever tried (have not tested Boron Nitride)