The spool's width, diameter and spindle size can be customized but its main feature is it prints as a single part without needing any support.

Updated:

• Added a selection for a smaller spindle.
• Displays estimates for how much the spool can hold by weight and length.
• Performs some basic checks to make sure the spool designed can be printed.
• Does a better job at limiting the diagonal walls to a maximum of 45 degrees.