I'd highly recommend the Antex Gascat 120.   If you buy it in the kit you get multiple sizes of soldering bits, hot air, blowlamp etc.    I've had one for probably around 15 years & some of the original bits are still good, though I have replaced a couple of the smaller ones.   Example: https://cpc.farnell.com/antex/xg12pkt/gas-soldering-iron-kit-120p/dp/SD00866  
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