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Just want to mention that Micro Mark has the Weller WLC100 soldering station with what appears to be infinitely variable temp and replaceable tips on sale for $23.50 should you be interested?
Disclaimer: I'm in noway connected with Micro-Mark.
I bought the Micro Mark "store brand". Nice little station. Before that I was using a 40 watt iron for everything, but it is nice to be able to dial back the heat for electronics work.