Just a simple rotor riot coaster with the exposed infill Bottom Layer = 3 Shell = 3 Top Layer = 0**
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/https://fbi.cults3d.com/uploaders/13257928/illustration-file/a8fd8aa6-8122-42b2-ae0f-56c0541454cc/Capture%20d%E2%80%99e%CC%81cran%202017-06-02%20a%CC%80%2014.26.39.png)