it is not a crazy idea and I use already this for some purpose but I think it could be a more easier way to have some setting like "open preview window on ………*. because you are more flexibel to order the windows as you need for different purpose during the work on the patch, e.g. to compare to stage or try different order. 

A workaround is to move the patch window on the second screen and then activate (Cmd+Shift+F) the preview and then move the patch window back to the first Monitor. It works well as long as you don't use (Cmd+Shift+F) again.

Best regards, 

Jean-François 

a screenshot with your solution on the bottom right:

I asked the rest of the technical team to join this discussion; but would it be a crazy idea to compose the image in a Virtual Stage, and sent that stage out to one of the displays. Since then we can actually use Stage setup to assign that Stage to a display and stick it.