Hakko 907 thermal transfer improvement (Copper Mod)

Hello, today I'll show you how to do the Copper Mod on a Hakko 907 Clone soldering iron. It may as well work for similar brands as the Yihua 936 soldering station. Here are the results for heating up my copper/cable test piece: Weller WS81 - 17sec Hakko 907 clone stock - 37sec Hakko 907 clone Copper Mod - 21sec So my modded Hakko 907 now has 176% of the stock thermal transfer, but still only 81% of the Weller, not 90% as said in the video. Still good enough for me, and for sure an improvement.