Do you plan on creating a project on a repo somewhere?
Here is a GIT which contains the code (with Keil uVision project which is small enough code to use the free version), and PCB in Altium as well as gerbers in the project outputs folder: https://bitbucket.org/christensent1/swaybar/src/master/
What doing a similar mod to the electric lockers? Then we could lock in 2HI/4HI whenever we wanted if the situation called for it?
No, that'd probably be quite hard. The lockers are powered directly from the TIPM so you'd have to fool the TIPM into thinking you're in a different transfer case gear which is just risky and not something I'd personally want to attempt. Better off just adding your own switches, cutting the wires, and putting relays on. Personally I've never in my life wanted lockers in 2HI/4HI or over whatever speed they cutoff at so I just left the lockers all OEM, but understand cases where some people might want that.