While attempting to take off front ds this evening I rounded off the heads of two of the 4 bolts that attach the ds to the tc. The other 2 bolts came out easily. I was told that Lisle Bolt Out kit would be the way to go in getting these bolts out. Anybody used this or anything like it? I used 8mm socket on the 4 bolts on the front end of the shaft and 8mm box open end wrench on the bolts on the rear of the shaft. The guy at advance auto told me that the bolts were 5/16". Is he right and is that why they rounded off?