jp,
I think it's all good. It's impressive that your Son has an interest and focus on this vocation. As long as his horizons for other interests remains open, all is good, IMO. What about the potential dangers in working with this equipment, and going on actual emergency runs/calls? It would be ashamed if he was injured in some way during these internship exposures. Just wondering if you've got this covered in awareness, that's all. Great sharing here! THX !

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'06 E320 CDI
'17 Corvette Stingray Vert