I commend you on your efforts to put together the training class. My input here is a bit late maybe but anyhow I think the many comments about safety are good advice. In my workspace (cramped corner of the garage), I don't have a picture of my ripped-off fingernail or one of my other ER trips. I do have this paint can permanently on display close to where I do most of my grinding. It's not bloody but speaks volumes. A few years ago a cut-off disc broke. A few moments later I saw a puddle of paint at the back of my bench. Since then my sometimes worn face shield is now close at hand and used whenever grinding, drilling, or doing other such activities.
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Nice handle. Glad it turned out ok for you. Could have been a forehead.