Oh boy do I have some opinions
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The Pinecil is the neatest thing I've ever seen and is top 3 best value items you can spend money on.
? $25 gets you an self-contained smart iron (with Bluetooth app) that is powered off USB-PD or DC jack 12v-21/24v (18v drill batteries work great)?
? I've done SOT-23 SMD work and 6AWG solder cup cannon plugs with the same iron (quick change tips)
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Kester #44 67/33 eutectic solder? I'm more a sticker on the eutectic mix than the brand I've not heard any reasons 60/40 is better, And lead free is mandated trash and should be avoided at all cost.
? ? Thin solder is necessary for small components but works fine on larger stuff just a pain to feed in 6 inches at once. The $11 tube of .031 off amazon is very nice and decent all around to use. Solder-paste is genius for SMD components and kinda OK to help tin stuff I guess.
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RMA flux is very cool and makes things a dream to solder compared to using just flux core solder. I got that amtech stuff Louis Rossman recommends but know nothing more about flux than that.
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I would add a roll of MG chemicals de soldering braid, 2.5mm and 6mm. NTE blue label is what Ive always used but they are out of business so probly won't find that
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TLDR;
Iron: buy the Pinecil and the fine tips set
Solder: kester 44 .031?
Flux: Amtech NC-559-V2-TF or other recommendations?
Also: MG chemicals de-soldering braid 2.5mm & 6mm