Koopa Shell
thingiverse
To simplify printing, I designed a koopa shell with two halves that need rotation. One half requires a 90-degree y-axis rotation while the other demands a 270-degree y-axis rotation. Unfortunately, an automated image won't be displayed for this object; hence, I've included a screenshot of one half from Repitar Host Slicer.
Download Model from thingiverse
With this file you will be able to print Koopa Shell with your 3D printer. Click on the button and save the file on your computer to work, edit or customize your design. You can also find more 3D designs for printers on Koopa Shell.