Blades
All I can say on the subject is a couple yard job of reflective ate my blade alive.
We ran a blade in our Graphtec for 2 years without incident. Please correct me but as I understand they (Graphtec) are the only hardened factory blades?
FYI and at your own risk, I was able to touch up the blade to get through the job. I needed it out before Monday when I can get a new one.