I originally bought the WSTA3 over fifteen years ago and it worked flawlessly until it breathed its last this year. I replaced it with another WSTA3 without hesitation. It heats up within 30 seconds, even when working outdoors in windy conditions, and does an excellent job soldering wires up to 10 ga. The interchangeable tips are a plus, as is the micro burner and hot air heads. I use it all the time for auto work where I can't get power for my Weller portable soldering station, and I also useโฆ