I had finished a cutting pass with the carriage split nuts engaged on my Craftsman 10". Just as I released the split nut an employee asked a question and I turned away from the lathe. The split nut was not completely released and the carriage powered into the tail stock shredding the 16/32 tooth gear. I was so lucky that nothing else was destroyed. It could have gone so wrong. Moral of the story, the lathe will take charge if you do not.