Managed to give the new soldering iron a proper test and whipped up this 16 pin eurorack power breadboard header thing. I don’t have a +/- 12V power supply to test it though, so we’ll have to wait and see if I’ve got the LEDs and capacitors round the right way.
I found the TS-BC2 chopped conical tip a bit unwieldy at times, and I’d rather try a proper chisel. Shame that the TS-D24 tip looks so chunky though, I can’t see it being that great for really small pads. Or maybe I just need moar skillz… 
First signs are positive though, whacking it up to 350°C makes soldering lead free solder so much easier!
I would’ve soldered up the 5010 breadboard helper board too, but couldn’t quite figure out which way to put the diodes in. I’ve decided to use diodes rather than the 10R resistors, as I have a couple of spare diodes, but no 10R resistors…