Well, I’ve been learning a lot about windows this week! I can now tell the difference between the different types of glass used on the the various shop fronts, simply by tapping with my fingernails on the window surface. Actually, this has become quite a useful skill as the glass type greatly affects the quality of the installation’s sounds. The best is the old fashioned single pane, and so before I install I begin my visit with my tapping in order to learn where might be the most advantageous to place my FeONIC driver. I am almost complete now – only three shops to go!