I recommend you drop the temperature to 650F on your soldering iron, and if you do any PCB soldering, I'd be at 550-600 maximum. I also use the needle-point tip for most of my work, especially PCB work. Truthfully, I haven't gotten out the extra handle with the chisel tip in months, never needed it. The beauty of a temperature controlled soldering iron is it maintains the temperature no matter what the load until you exceed the heat that the 70W element can deliver. Soldering #18 wire with mine at 650F with the needle point tip is no problem at all. For really heavy wire, I get out the Weller soldering gun.
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