Have a TZT2-12 and a TZT2-15 installed with NXT radar. All networked and working exceptionally w/exception of one issue. When the chart screen is active on both units, the chart enlarge/shrink function on one mfd works both mfd's at the same time. In other words, what I see on one screen is duplicated on the other. Is there a way to un-synch the two mfd's so that differant aspects can be viewed at same time, e.g., one up close and one longer range? Is there an un-mirror setting?