you have great patience and self restraint.
I've learnt the hard way lending tools, even intelligent people with their own saws, they always come back at the very least needing a new chain, or bar, or engine, or even a bloody crankcase!. A friend lent a two stroke mower to a brickie along with fuel can and oil bottle attached to it, told him how to mix fuel, to shake before filling and he still straight gassed it first tank. He said "Your mower is rubbish" followed by "Oh, I wondered what that oil was for" Yeah, DUH! I've always fixed other peoples cheap junk that I've had to use, like a trailer with dying tyres and a exploding wheel bearing that went on me but other people have always just handed back my ruined tools and shrugged, "it doesn't work" No, not now, but it @#$%&*? did. I now have a standard two word answer these days and the first word is "get"