A pretty simple travel kit for the non-foldable crank models. Take the crank and the grounds jar off, put the cap on top, put the bottom holder in, screw the jar back in, aaaand you're ready.
I had better luck printing the cap in the final position, meaning the top side up, because it needs to be pretty smooth for the handle. The bottom side is not that important.
The cap will probably be pretty tight in the beginning, but should loosen up a little after a few uses.
Please leave a comment if it doesn't fit for you (I also appreciate comments if it does), because I could only measure my personal C2, and I don't know Timemore's manufacturing tolerances.
Update 2022-12-09: I added two new versions of the bottom ring, one with the clamp 2 mm higher, and one 4 mm higher, to accommodate shorter handles.
The author marked this model as their own original creation.