Looking at selecting a Glass Break Detector. The window area I'm trying to cover is a double french door which I'm also planning to use contacts. For the GBD, I wanted to use the Visonic Glasstech but the installation doc states 'not to be be used with hinged glass doors' so I guess this one is out. I'm looking at the Bosch DS1101i and DS1108i. The only difference between these two units (that I can tell) is how they are wired. If someone could help explain the difference in layman terms it would help me decide (plus I would be sure to wire it correctly the first time!). Here is the wiring diagram I took from the installation documentation: