x 2 on breaking the case halvesI took a look at an engagement collar I have here. It actually has no chamfer on the teeth. Square edges. If you're luck you'll only need to replace the collar. I know people were all jazzed up about the Spidertrax 300m collar when it came out, but I prefer the stock ARB parts. The 300m gear just makes the case half the weak link and replacing that is like 3x the cost of an engagement collar.