We’ve been using the Dichroic Atomic Vapor Laser Lock (DAVLL) system for laser stabilization in our lab. After getting tired of our first version of a solenoid coil, I turned my summer students loose designing a new one. Not only is the version vastly better, but it’s made in-house on our own 3D printer.
I’m proud to say it was recently featured on Thingiverse as thing 25902. Way to go Noah!
If you want to hack on it, the original is available on tinkercad.