I recently bought a Z Buzzz I've never seen a disc with a thicker flashing, almost 5 mil I'd estimate. Before removing the flashing the disc was more overstable than a drone and had no glide at all, just hyzer'd into the ground. Now flash-less the disc flies like a buzzz.
That is odd. All of my second run buzzz's have no flashing at all. I was actually very impressed with Discraft because of that.