Cages should be printed in 2 pieces. The "guide caps" are not strictly necessary, but fully enclose the dart during its path through the wheels, and help accuracy. Cages should be printed face down, with the motor holes point up.
These are totally open source, feel free to modify and reproduce these as much as you want, just credit myself and u/qxtman on reddit.
Further development will include higher crush cages with critical velocities >140 FPS. Those are complete but awaiting chrony data.
If you have any questions or suggestions, PM me.
Happy New Year!