By request I've created this dual slot version, the original has a single slot and a single channel. See photos to see the differences. Both work well.
I've tried a lot of different clips and have not been entirely happy with them so I decided to implement a new design of my own. I put a lot of thought into it and made many prototypes before getting to version 1.0 Here are the features I designed into this clip:
If you try this clip and it does not work for you, please let me know why and I'll see if I can make improvements.