This is a remix for smaller printers than the one used by the creator (I have a Prusa MK2s which can not print the big parts).
short_box_2_si shortened to 4 slots are the green boxes that you can see on the picture.
Spirit Island insert for short boxes 46mm (4 slots) is the RED box in the picture. It will be HIGHER as shown (as high as the original creator's card holders, I just had to abort the print and was ok with this half-sized version. You can always just cut at a Z value to get a short version like I have it now.)