[Racer26]

Yup, selectable autonomous is doable from both the DS and Robot end of the equation, though admittedly, I feel its easier and less prone to muck ups from the Robot end.

Its been being done by lots of teams for many years.

My team specifically has been using a device called a thumbpot, i think. It is a 2 digit selector with + and - keys for each digit, and reports an analog voltage back to the cRIO. Some fancy code to turn that back into the number shown on it, and away you go.