Hi guys, I've got a client that's been asked to paint some letters on a rooftop. They're a general contractor, and will be handling the painting themselves, but have asked us to produce a stencil for them. The overall size is going to be 200'x20' and 145'x20'. It's just plain Helvetica text. I'm almost leaning towards going up on the roof and drawing it out for them by hand with a tape measure. Does anyone have any pointers on this?