I need to fix one of our slalom courses, where half of the bouys are missing, because the eyelets on the anchors at the bottom are rusted out. Can't find the anchors because they are covered in muck, basically need to put in new anchors. Anybody use RTK GPS to set up a course ? I know Sure Path has a program on there to do it, at least check your location. Kinda need something cheaper though. ??