About this 3D model

This is a relatively space-saving top spool holder. In addition to the 3 parts in this document, you also need to print the A1Mini version of the external spool holder made by the author "达文西". https://makerworld.com/zh/models/119707#profileId-128773 Note that the shaft and shaft cap must be printed in this document. Note: The shaft in the document must be printed flat to obtain sufficient strength, unless you are very confident in the performance of your consumables, I do not recommend printing vertically. When installing the top bracket, I recommend installing the single screw at the back first, then clamping the bracket into the slide rail and installing the other two screws.