I have the HF 8x12 lathe. It comes with a 4" 3 Jaw chuck. The specs say the jaws are reversible. So far, I have not been able to figure out how to do that. I can take the jaws out of the chuck with no problem. However, if I flip them over so that I can chuck larger pieces, the grooves in the jaws are going in the wrong direction to engage the spiral scroll in the chuck head.

There must be something obvious I am missing ...