I have a Polar 76 EM and it works with a LMS (Linear Measuring System) module. I am not sure but I want to learn how it find the reference point at the turn on the machine. The device is find the reference point on LMS system is it true? If I want to make a modification on the machine what is the reference point size? Is it at 40cm, 20cm or where the machine must be produce the reference point signal?