Easy one on the liability.
If it goes boom then you can be sued. Not remotely worth it. I work mechanical maintenance and my mantra is, no I will not work on your furnace. Why not? Liability issues. Oh we would not sue, yea right. Care to put that on paper? Get the look..... Right up there with, of Fifi doesn't bite.......
I only do it for my brothers and its safe load stuff, nothing pushed to the maximum even if they asked for it.
For anyone else, I would not reload for them nor let them use mine.