I wouldn't let my tools leave my house, but I would share them in my home with someone I was teaching. I'm big on supervision, especially on things I've invested my own hard-earned cash in. I would also share tools in my home with someone I already knew was well acquainted with the proper use of those tools, and who could be counted on to repair/replace any damage done, like personal friends or relatives, but even then they would have to use them here. Too many of them have kids and pets running amok, and it's safer if I can put everything back where it belongs after it has been used. On my machines, they are allowed use of my "backup" machines, (again, using them here) never my primary machines... still good machines, but not the one that I know I can't afford to replace. So, to sum it up, I feel like I'm generous, but not stupid. LOL!