MakerBot Print is our newest print-prepration software, which supports native CAD files and STL assemblies,
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Assuming that by "4x4x6" you mean build volume of your 3D printer in inches (1 inch = 2.54 mm), then the max width and depth you can 3D print would equal 101,6 mm. This is unfortunately too small to be able to fit most parts of this spool holder.

Nevertheless you can download them and cut them in smaller parts which you then can 3D-print individually and glue together. We recommend you using a software called netfabb Basic (http://www.netfabb.com/downloadcenter.php?basic=1).

  • Download and install netfabb
  • Import an STL file
  • On the right side below the parts list there are three sliders
  • Drag any slider to until you see a slicing plane on the model in the 3D view
  • Choose the appropriate slider and (X, Y or Z) and place it where you want to cut the model
  • Press the button "Execute cut"
  • Now you have two parts
  • Right-click on one and save as STL
  • 3D-print them individually