Soldering Iron
I use a Weller 75W Iron with a 8mm round tip, made for doing lead window work but is superb for our hobby cost around £30 at local Machine mart. Holds lots of heat and use it for just about everything apart from soldering wires to servo's, break out the 45W weller TCP for that.
As for the debate on Leaded or Lead free solder, I use both. Leaded for home use and Lead free for work. Took time getting used to using Lead free after 30 years of using leaded but will stick my neck out and say that Lead free solder for our application is crap.
It produces overly 'hard' joints which can be fragile and to top it all off there is a lot of very corrosive flux in it to make it flow better, more so than tin / lead solder to the point where at work I am replacing soldering iron tips because they have eroded through ! You also have to use higher temperatures to make it 'melt' so this transfers through to your ESC, Motor etc.
Best solder to buy if you can still get some is 60/40 Ersin Multicore, avoid anything with 'green' on the label ! ! Not cheap but the best !
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