Today I was shown a very useful site for anyone who is looking to print posters or stencils.
Yes you have to love the name, but also marvel how useful it is. Today at work I had to enlarge a very small resolution image and try to print it off in A1 paper size. The image still came out extremely low quality but all I need it to do was have a vague outline to trace around to create a stencil. Credit to the people to created the Rasterbator as the grid preview is genius, this saved me a few minuets of playing with Illustrator art boards.