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TheFisherOne

Staircase Puzzle Fidget Puck

by TheFisherOne Nov 11, 2017
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I am guessing that this is dependent on the resolution of your printer. Printing them separately would definitely work.
The openscad file also contains settings to make the gap wider.

Slic3r intentionally fuses the 5 pieces.
In some places the gaps are very small and Slic3r decides to ignore the gaps and connect the pieces.
This can be easily solved by pressing the 'Split' button, then Slic3r understands that the pieces are separate parts.
Another solution is to print the pieces separately and assemble them later.