Mustang Shift-Knob

I designed this shift knob as a Christmas present for my dad to use in his Mustang GT. The exterior of the knob is 3D-printed in stainless steel and coated in a black finish. The interior piece is printed in a high-resolution resin. This allowed me to print the threads necessary for assembly and installation. In SolidWorks, I created a parametric model that adjusted the hole pattern. The further the profile is from a central vertical axis, the larger the holes are at that point on the profile (adjusting the profile curve directly changes the size of the holes).  My favorite part of this design is the shift pattern symbol on top of the knob.