Thanks for that.

Yes the still cams are exceeding the res of the video, by sufficient to allow plenty of repositioning.

I intend to aim them using a target, effectively a brightly coloured ball on a suitable tripod, this presents the same shape to the various cameras at any angle. If I have to need to move the rig around readily, and need fast setups, I'll use laser gun sights mounted to the hotshoes after calibrating each to individual cameras, but that's like out there man!

I'm working of the design of the camera mount now, it needs to have a kind of rough adjustment, followed by the ability to fine tune them, so it's ball/socket heads and brackets with thumbscrews or something to shift tilt, horizon and pan. A lot depends on the path of the cameras. Clearly though, the better the initial alignment, the less to fix in post. The problem is when you've got fourteen ball heads to buy it does become somewhat costly . So it's a DIY job I expect.