Terns are small white seabirds that can hover, but it's also a 30-key keyboard! Ryan Schenk aka @crankin/rschenk has published the files of his Tern, based on the Hummingbird.
I much prefer reachy thumbs vs tucky thumbs. Years of wiping out on skateboards means my right thumb doesn’t really make that tucking motion anymore – rschenk.
Specs
Differences from the Hummingbird:
Hotswap sockets
CFX spacing (tighter than normal Choc spacing)
Pinky keys are dropped down
Thumbs are more reachy
All the necessary files are available in the repo: Laser cutting files for a case, switch plate (1/16" acrylic), 0.6mm silicone gasket sitting between it and the PCB. There is even a file for cutting a sheet of self-adhesive foam for the back which in the author's opinion really helps to dampen the sound. Ryan used 1 mm sticky backed EVA for this purpose.