A suggestion/request for the Mk II...
Firm up what the connections between the docking bay and the unit can/should/would-ever be, and use that.
The logic I am thinking of here is to make it work in such a way that I could remove the Mark II unit from my car, open up the box to my Mark III unit (down the road) and insert it into the same chassis, giving the new chassis I received from the Mk III to whoever I sell the MkII to.
I understand the connections, etc, are changing on the MkII unit, so if you go THIS route, then future upgrades won't require professional reinstallations, reducing the upgrade cost for users and increasing the chance of people doing it. :)
If this was already planned, then please feel free to bitch-slap me at your convenience. :)