To Whom it may concern, I recently purchased a Model 91130 Router w/full size table however when I attempted to insert a 1/2 shaft router bit into the collet it would not fit. The 1/4 inch collet works fine. The 1/2 inch collet will not accept an 1/2 inch bit I have tried to install. I even removed the split ring and inserted a tapered dowel to spread the jaws but they just returned to their original size when I removed the dowel.Can you replace the 1/2 collet? Thanks, Al Johnson