The full project, including the latest revision of this system:
https://github.com/machineagency/jubilee/wiki
A snapshot of the toolchanger locking mechanism CAD Files:
https://www.thingiverse.com/thing:3805144
And Instructions!
https://cdn.thingiverse.com/assets/5d/76/33/74/d2/toolchanger_carriage_assembly_instructions_draft.pdf
https://cdn.thingiverse.com/assets/f0/56/bb/d9/a8/toolchanger_lock_assembly_instructions_1.pdf
https://cdn.thingiverse.com/assets/9f/a7/3e/f0/18/parking_post_assembly_instructions.pdf
This video discusses first test prints and some details behind the tool locking mechanism.
Now go forth and build your own!