I love the posable action figure by Lucky 13 Toys. It's a brilliant model and I printed a bunch of them. I then noticed that there are a few examples of storage but nothing really comprehensive that includes any complete collections, so I saw that gridfinity is a good system for stackable storage solutions and here is the result.

I made the cases with two scales in mind - the standard scale which includes all the hands accessories and weapons accessories, and the 150% scale which can still hold a considerable amount of accessories, but it's not as tidy as the standard version. And also a separate container made exclusively for the 150% scale hand accessories.

the hand display slabs are designed for the hands to sit on them and should be printed in PETG like the frame of the Dummy 13. They are designed to slide into the slots in the container. that way, then the insert is in the case, you don't have to slide it out, you can just pop the needed hand into place, and nothing rattles around.

This is a montage of the custom 5x2 gridfinity case that was made specifically for the 150% scale hand accessories for the dummy 13 action figure.

This is a montage of the Gridfinity storage box with a custom insert for the 150% scale version of the dummy13 action figure.
Note that I made this as a modular container, meaning that it can be used for other things as well, and it is stackable and storable with other Gridfinity accessories in all configurations because the hinges are flush with the rest of the case.

This  is a montage of the same 5x3 gridfinity box, but now with the standard sized dummy 13 insert, which has room for all of the hand accessories as well as the extended weapons.

I hope you enjoy them.