When I say the cam retainer plate was worse than the hub, I wasn't kidding. Three of the four bolts got stuck. Two torx bits got twisted from the effort. THEN, I got an impact grade torx bit to try to get the third stuck bolt, and it just rounded off. The one nice thing about a torx bit is the center has a natural valley, so your drill bit finds the center quite easily. So, I drilled into the first bolt, got the extractor in, and the extractor SHEARED OFF INSIDE THE BOLT.