Dan - if you have the NMEA interface, you can actually do that with software on a PC and have is put the data back on the NMEA bus and use the TackTick custom displays. If interested, let me know. I have the TackTick development documentation that shows how the custom display formats work, and what you would send over the NMEA interface.

I asked TackTick about that function and the starting line function that are in the Maxi Displays but not in the MN100 series displays. The answer came back that they did not have enough memory in the smaller displays to handle additional software required to do that. I also think they wanted to differentiate the performance of the maxi displays for marketing reasons.