Here are the KiCad files of my (analog soldering station)[http://electronics.vlzqz.com/analog-closed-loop-controlled-soldering-station.html]
There are both SVGs with the PCB layout, as well as KiCad files so that the desing can be adapted.
JanoVel/lm324_soldering_station
The KiCad project of the lm324 soldering station described in this post: http://electronics.vlzqz.com/analog-closed-loop-controlled-soldering-station.html
MIT