Yes I think that's the best option. If your ZWO act as standard usb camera, you can activate it's video stream directly from CC application, see version 3.2.0-beta3 here github.com/sajmons/CollimationCircles/releases.
If your camera supports absolute focus, you can control that too from CC (see camera controls button for that). With that you get hassle free colimmation of secondary and primary mirror. All you have to do is to change your camera focus distance from within CC app.

I'm not quite sure if this is working in latest version, but I'm working on it and will be available in final 3.2.0 version.


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