Automatic Transmission Selector

This is a selector that I made for my automatic transmission (http://www.thingiverse.com/thing:1094616).

It has an interlock mechanism and manual mode, so works like a real one. I made this model because I plan to print my automatic transmission and put solenoids controlled by Arduino, so I needed a way to select between modes, and even select each gear manually.

Why? Well, I have an engine model that runs like a real one and I want to put the automatic transmission and all that to simulat