Step 3: Scan Original Blueprints
I was given the sheet of blueprints (actually white zeroxed copies) to work from. I taped the relevant portions together and traced the image to be cut on white butcher paper. Then took it to a local architectural copy shop (FedX-Kinkos would do) and had them make a digital file. They also sized it a bit to match the dimension given on the plans. I was enlarged 1.6%.