I have a Black and Decker Firestorm FS1800D Chuckless Drill. I must have lost the retaining clip because the chuck began to slip. I looked at an exploded schematic online and realized that I was missing the retaining clip. I purchased a retaining clip, but I cannot figure out where it is supposed to go on the shaft. There is a groove in the shaft, but the clip does not snap in. Am I supposed to bend the clip into the groove? I have never seen on installed so any help or photo of the installed clip would be of great help to me. Thanks, Mark