Fawazhay - 9/2/2011 10:48 I would not be paying for the 20 hours unless they can show you many unique issues to your machine as to why it took 20hours. I would tell them if they value your business at all, there will be an adjustment to your account. I posted a few months ago about a problem I had with a dealership and working on my AC tractor. I just ticks me off when you pay the experts and they miss something. If I miss it in my shop, I understand I get to repair it again, but when they miss, I don't feel I should have to repair it again; they should.