I ordered a GW7900-1AL (positive display) from Amazon, and the negative display GW7900B showed up. They don't have anymore stock of the positive display model and they are $50 more on Ebay.
Anybody out there perform an LCD swap on a GW7900? I have seen the articles on rotating the polarization, but the LCD's are cheap, so I thought I would see if anybody has done it. I have seen folks doing the swap on other models, but it seems like there could be some weirdness on this one relative to the moon or tide display if I swap.