I know I asked on another thread, then said not to comment on it. But is there any PDF's on changing them? The photo is the original. When I did find the bit that when the allen screw loosen, it allowed the bit to go up in the quick change and the allen screw was fired from the QC head and chipped the first QC. This is the pic of it. I haven't got it off yet. Been waiting on Fedex to deliever my new QC, which came today. TGIF!!!!!