Hints and a question.
What if, the scope was directly behind the shooter in line with the flight path?
Have you come across an app that allows for remotely starting the video such as shouting at the darn thing or a wifi/bluetooth gizmo.
I think I found an iPhone app that also has a reticle of some sort. Can't find any details on it though and can't recall the name.
I'm using a DIY adapter between a Nikon XL-II and a Cannon point and shoot. Had to adapt a cable shutter release to keep from having to touch the thing.
Works pretty well but you system seems much better. Especially the glass.