open cable chain lock

I really liked the chain here ( https://www.thingiverse.com/thing:1760952 ), but for a drag chain, it should only bend in one direction and lock into the other.
So I remixed the lock, so it will prevent the chain from bending backward.

I also created a smaller lock, which you can just slide in from the side, but then it will bend in both direction again (of course).

Update 05-01-2018:
- I made a different version of the big lock, which clips in more easily, but not sure how happy I'm with it. You can try it out and if you have recommendations write me a comment.
- I made mounts for my Anet A8 https://www.thingiverse.com/thing:2746790