Heres my new home made Automatic Observatory in all its fluid glory ;-).
http://www.youtube.com/watch?v=xs8boe4xruM
Its triggered remotely by serial PC command, and has tricky extras like close on strong wind, rain and PC failure/power loss.
The hard lockdown as show, is with car doorlock actuators.
It can go a lot faster, and with both sides operating together, but for safteys sake, slow sequential operation seemed the sensible way ;-).