We have a practically unused TP5000 tiller pilot in need of some help. (AKA Crazy Otto) After 45min he proceeds to do circles instead of maintaining course and we have to shut him down. What we would like to find is HP5000 hand programmer or the wiring diagrams to explore driving him with a sentence or two from the GPS. Anyone know what happened to Navico? It is my understanding a radio control box JB5000 would provide the same interface. (NEMA 180,182,183 supported). Check your junk box.