Hi Lee, there won't be any centre latches, the tail fins will act a bit like a 6 series roof mechanism
z flaps will probably be controlled by a servo, there's one in the video on the roof, I just didn't reference it because I've just done controls work with it for feasibility, I've bought a step down transformer 12- ranging from 6 to 4.0v, A mini servo should fit the job.
The Arduino will control most of the roof automation, I'll partner it with a digital I/O board to increase the number of inputs, current load sensors will be separate, I'll have them just trip the power. Most limit switches will be a diode return path set up to reduce the wiring in the system.
Please bear in mind, there's going to be a fair amount of things not working out before I get any real progress. I'm only a man in a shed
Darren