Ya know, after two years since the inception of this thread, and hundreds of owners since doing this mod, I just gotta agree with ya!Hardly any gap is all the gap you probably need. It's a pretty small risk to run with it. I'd say pretty low risk of scratching or cracking a window, and if you do, replace it, and lesson learned. Shattering the glass I seriously doubt could happen. Most likely is years of trouble free life.
Especially considering all the positive reviews of this mod, without one reported case of a broken window that I know of, maybe you are being overly cautious.