Make an Earphone Buddy from the measurements below Before starting, watch the video screencast of the CAD drawing actually being done in the software. Click this link for the video instructions Earphones can vary slightly in diameter, so first check that the 16mm on this diagram will work for your particular headphones. Also, different 3D printers have different levels of print accuracy. Typically, they will print small apertures a little tighter than the measurement on your CAD drawing, so check whether you need to make the hole slightly larger to allow for tolerances with your 3D printer. Print time is 30 minutes on the Makerbot Replicator 2X 50 minutes on the UP Plus 2. Diane Burton, STEM Outreach. D.S.Burton@warwick.ac.uk Why not design your own Earphone Buddy?