I take my plans with me and give the person the disc and just say 100% please. As the plans come out of the machine I have the original taped to the window and make sure there machine has printed them to the correct size just by placing the printed copy over the original. If I'm getting two copies made they don't need tobe exactly the same as the original, a little over or under is OK. Your going to cut upone copy and build over the other so as long as they are the same your OK. By matching the copy to the original it will also show the machine operator how off there machines calibration is. Not too big of a deal. If the operator is a pain I make them get the copies dead on. I can be a pain myself when I want to be.