hi, i have a set of plans that are 17 1/2 inch wide by about 4 feet long what i was wondering is i am going to have a blue print shop enlarge them can i just tell them i would like them enlarged as big as they can fit it within there 36 inch wide roll at what point will they get jaggedy when enlarged ? i am not exactly sure how they enlarge do they just run them through the plotter? the sheet consits of formers that i would like to get enlarged to twice the size any help would be appreciated thank you