Magnetic headphone mount for Uplift desks and Bose headphones

I had been looking for a way to mount my headphones to the side of my Uplift desk.  There are lots of options that clamp to the desktop, or screw into the bottom, but I didn't want to permanently alter the desk.

There are steel rails along both sides of the desks, so I looked into magnetic mounts.  Without finding anything suitable, I built my own.  This make uses some strong neodymium magnets to mount to the side of your desk.

Parts list:

• Strong 20x3mm magnets.  I got mine on Amazon here.  Note they actually measure more like 19.75mm x 2.6mm and the print now requires those odd dimensions.
• Some grippy material.  I used some Scotch double-sided tape I wore down a bit.  A TPU sheet (maybe even 3D printed?), Plasti Dip spray, or other thin (it's important it's thin!) grippy material may also work.

The magnets are captured within the print, so you need to set up your slicer to pause the print right before the slots for the magnets gets covered.  If you have a Mini, I've attached GCode already set up to do this, but if you need to slice it yourself you'll need to add this manually.  Here's instructions on how to do it in Prusa Slicer.  When the print pauses, drop in a stack of 2x of the magnets I posted above into each hole, for a total of 6 magnets used.

Finally, note that this model is configured for a first layer size of 0.2mm and a typical layer height of 0.25mm.  This makes exactly 2 layers of material between the magnet and bottom of the print at a total of 0.45mm.  One layer is too few (the magnets will pull out the bottom), three layers is too thick (reduced magnet performance).  Two is just right.

Once the print is complete, you'll notice if you try to use it right away it'll slide down.  The magnets are plenty strong to hold the headphones to the desk, but not strong enough to keep them from sliding down as both surfaces are slick.  This is where the grippy material comes in.

I placed two tiny ~5mm x 10mm dots of double-sided tape on the back of the print.  Then I pushed my thumb onto them a couple more times.  The oils in your fingers neutralize the adhesive a bit, making it less sticky.  We don't actually need the tape to stick, we just need it a bit tacky to keep the print from sliding down while the magnets do the heavy lifting of holding the mount to the desk.

I tinkered with this one a lot.  Let me know if you have any ideas on how to improve it!  Enjoy.