Does anyone offer any type of guarentee on the performance work they do? I do some side jobs and so far they have been for mostly people that I at least kind of know so I haven't had any problems but now someone that doesn't know me is asking for me to write up some kind of contract stating that I am responsible for anything related to the install. I'm not sure what to do. I'm not trying to get out of fixing something I mess up but I just don't want to be held responsible for something that I cannot control. Any ideas? Or what do you guys do for customers?