Hi everyone, New post....sorta a continuation from my earlier one called "YARD SIGNALS" had no luck in responses. Briefly i want to hook up a signal that has 2 LED's green over red to my rail yard. I have 4 spurs off my main line. I wanted to hook it up to my switches so when one is open it turns green and closed it is red. I came across the site from Logic Rails Signal Animator called a position sensor. Basically i believe it will do what i want but not familiar with the item. has anyone used it?? Does anyone know how it works and how easy it is to set up???...i dont want to invest if it is complicated or rerquires a lot of additional switches and misc elctronics, a few is good but looking for a simple way do get the look i want. Thanks Dave