To get more tailstock travel before ejection I cut the tang off one of my MT# 3 drill chucks and it would slip once in a while with large drill bits (1.00 plus). I ended up welding the tang back on again. No more slippage. If the tang was not to prevent slippage, why is the tang a rectangular shape and why is there a matching slot to receive it inside of the tailstock. My live centers don't have tangs and they still eject just fine.