All I can offer is my experience. I cut those squares about three years ago. Our AX lot is far from smooth... On Saturday we had to alter the course because a pothole opened up. All that debris on top of the strut came from that event. Nevertheless, after all of the abuse, no cracks. Like I said before, though, I should probably be concerned with how OK I am with using a die grinder on my car, but I'm not. Roll on, little race car!
