Boa you do not know what your talking about. Had Dealings with World Years ago. I know when they started with the Haughton Works in Drawer stuff. They were very good on that but that was it. You cannot confirm a board works unless you hook it to a simulator and access it. I know better then your I/O check thinking a board is fixed. Go ahead pay for your disappointment and leave customers waiting. Also there is no difference between Selling and Using if it's Illegal.