Unless you have forgotten, when Heidelberg builds presses, the right hand side of the press typically has greater control because they use parts that are engineered using magic dust from fairies and pixies and hand made by leprechauns. (and we all know that German fairies and pixies are more special than ordinary ones and don't even get me started on how much more training leprechauns do today). So you just impose the color critical job to run on that half of the press sheet.
By the time I walk out of here, I'm going to be a lean, mean, prepress machine...