Background I work at a genetics department and wanted a fitting way to store my whiteboard markers. The model is a right turning double helix depicting the DNA backbone. The markers take the place of the nucleotides connecting the two strands of the double helix together.  Real shape of the double helix by: Zephyris, via Wikimedia Commons Printing instruction I printed the model without any support on my CORE One+ using Prusament Woodfill Chocolate Brown . I used half the default bridging speed and lowered the printing temperature by 5 °  to 190°C.  The slope of the helix is steep enough to print without any issues. Only the holes and the top required minimal post processing removing a few small artifacts. I did notice some flexing of the helices after about 2/3 printing. This might pose issues for bedslinger printers. A lower movement speed for the top part of the model might be needed. Final note Credit to my kid for discovering the cool way to rotate the model using a pen (see gif in the photos section)