AntiSlide puzzle

i found this antislide puzzle here
https://www.puzzlemaster.ca/browse/novelty/acrylicpuzzles/15619-a-couple-of-anti-slides?a=709294

and was trying to recreate the black part of it.

The f3d file is included

and the 3mf file has all the pieces with the correct count.

if you are getting the stl files instead, you'll need 2 of the C pieces and 3 of the I pieces.

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the goal of the puzzle is to arrange the pieces in a way that the pieces are fixed in place on the tray with none of the pieces being able to slide