I've been using the Tablet mount available on Amazon for some time now and, while it's okay to use with my Nexus 7, it can get in the way when a passenger is in the car...so....while it's technically not something I did "
to" the Sonic today, I did design a cell phone holder that mounts into the little slot in the dash normally used for holding a parking permit or whatever the little slot is used for...
It's for my Droid 1, which I planned to use as my music player since it can play back the sound, using the blue tooth connection, from music videos I download from youtube.
That said, I then turned around and bought a new HTC One M8 so I had to redesign the case to hold that behemoth...(Still finalizing the design on that one so no picture)
I just need to finish the M8 case and print out the two prototypes on my 3D Printer and test fit the phones and then test fit the holder in the slot in the dash.
I'm debating whether or not to print a multi-color case or go with a single color. I have spools of ABS filament in Green(Kawasaki green), Yellow, Red, Blue, Black, and White