Okay, I need some help on this, as I am total lost. Manufacturer A makes a product and Manufacture B makes a product. Neither are a medical device until they are connected together, separate they are just component pieces. How do you go about writing a letter stating that Manufacture A wants Manufacture B to be the one to do the tech file and taking all liability of Manufacture A. (This probably makes zero sense, but I am at a loss.) Any help would be appreciated.