Leap Motion Holder
Using a Leap Motion tracker on Desktop mode can be very hit or miss. I adjusted it several times before finding a decent configuration that would work much better. The design is fairly tight and the little slit at the bottom will flex a bit to let the leap motion settle in tightly. I added little rubber nubs to the bottom so it wouldn't slide around.
Note: This was made in 3d Builder and the model has weird artifacting on it but it slices fine in Cura.