>>106328375
>I use colophony for tip cleaning, dunno how well it compares to those dedicated tip refreshers.
As long as it works for you, stick with it. If you have issues with solder not sticking well to the tip due to oxidation, consider ordering one of those refreshers, it's worth a try. Tips are cheap, but those cleaners last ages, so in the long run they're still cheaper.
>but I just can't melt the solder on the thick ass power wires on the junk PSU I use for practice
Thick power wires can be a torture test for sure. What PSU are you using for your pinecil (wattage)?
It's easy to run yours off a PSU that's not powerful enough, it'll still work but struggle with larger heatsinks.
See https://pine64.org/documentation/Pinecil/Power_supplies/Watts/ for more details.
I ran my TS100 (got it before pinecil was a thing) for multiple years off a underpowered PSU and always was a bit unhappy with its performance, only to realize once I got a proper one that it was user error.