Dig, I've about worn out the heel of my right hand generating the heat to cure and perhaps some grain filling effect also. I have also left it on overnite with no problem that I've observed.
Joe, I'm not a man of leisure; supposed to be at work at 6AM but didn't make it this morning. No matter. The reward for hard work is more of same so I try not to do any of the former in the hope of avoiding the latter.

jack