Sure, tell your boss that when someone gets killed or hurt, it's now 100% his responsibility, and he will loose everything in court. I have first hand knowledge of this, and have seen the aftermath. Even installing factory replacement windows yourself in machines will open you up for massive lawsuits. At least with factory windows, even if they are the same material, the company assumes some liability who makes them, so would a service organization that installs them. ALL machine windows, no matter how good they look, are supposed to be changed after 5-6 years.