A good first layer is mandatory for the print to succeed. Be sure your printer is calibrated and you have good bed adhesion.
I recommend a slow and thick first layer (8 mm/s and 0.3 mm).
Good layer cooling is also recommended, as it prevents curling and warping on overhangs.
You shall not share, sub-license, sell, rent, host, transfer, or distribute in any way the digital or 3D printed versions of this object, nor any other derivative work of this object in its digital or physical format (including - but not limited to - remixes of this object, and hosting on other digital platforms). The objects may not be used without permission in any way whatsoever in which you charge money, or collect fees.