Yeah, maybe I assume he would think about a mask. But I don't assume. It's like the manufacturer of your product you purchased assumes you read the directions. Maybe I'm from the old school where a question on my part is supposed to bring out a thought process or question from the questionaire (or student that asked the question). I wish all those who come to ask to also think with common sense. By the way, I'm always in high gear or I fall asleep. I did not mean to offend, just raise a solid thought process so the people whom ask a about a subject that they either don't know or have experienced, to look at the process and think for the good of their health and nice finish to the project. I apologise If I offended you Jack. Not my intention at all. (just think of me as that shop teacher that you despised )