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Sounds like a good idea in theory - but . . .
2 different sets of Master Darks and the complete Darks library to go with it
2 different sets of Flats to take each night
2 sets of equipment to manage focus between frames
So thats a lot of extra data, processes and potential problems to juggle with and more time taken per night getting the calibration data you need.
More problems on pier flips managing your image data orientations.
If you have your processing down pat and never ever get mixed up - Maybe, just maybe - if not, I wouldn't.
There is always going to be flexure and misalignment - no big deal, but when the two cameras are rotated its another misalignment step to deal with.
Guiding with three scopes to manage now - double the flexure problems on longer exposures.
At the end of the day it sounds like you are trying to get better results by having more data but in reality you are not improving the quality of any particular system - guiding, tracking, acquisition, image quality, focussing.
Potentially even reducing some of those.
Given the extra time doing flats etc you aren't necessarily going to get double the exposure time anyway.
As Peter says
. . . just get the CDK17
Rally
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