Thalass -
(can't make out the BDBE or BOBE in your avatar)
Cool idea. For ease of implementation, I was thinking you could have a manual version for the driver's side. In most states, all you need is the driver's side anyway.
I keep imaging a ball stock that has a high degree of angular movement :
The above is not what I would use, but illustrates what I am thinking in my mind.
CarloSW2