jbensman, thank you very much for taking the time to put together the topo and overlay. it looks great. i haven't had time to test it on the water but i have been on a few road trips around the area and everything looks perfect. As far as your previous questions about all the different types of buoys, this setup works well. if i were in a Large boat/yacht it may make a difference but for the average boater just knowing where the markers and buoys are is enough. If you need anything checked/tested or any input please let me know and i will help in any way possible.