It's because of this problem that I won't be offering my services. A fried tuner (for whatever reason) could be rather expensive replace, especially if it isn't your tuner to begin with. I feel the risk to great to bother. You could end up seriously out of pocket, even with just one malfunctioning tuner. There's also the possibility the you might not be able to get hold of another kit for this person, then what do you do?