Certainly an idea worth investigating. Minimising flexure will be your only really issue. You will need to run two computers too for capture. It will be simpler that way. If you OAG with the longer focal length system and the other system just captures this will help with star shapes.
It will certainly mean you can devote one scope purely to the capture of luminance on any given night. With 4 nights of capture you could quarter the capture time if you want to maximise mega data collection.
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