I haven't fitted an alarm system for years, And now My mate wants one fitting in his house, I used to use ADE ACCENTA panels and Medusa PIR's..... and Novaguard bell boxes......Im looking at using the same for the new install at my mates, But i need to use some shockguards on a couple of windows. I cant remeber what make we used to use, but what do you chaps recommend for a good reliable shock guard.