What's the best method to take autoCAD drawings to Illustrator, I've been trying to use PDFs but hatch appears to be brought into AI as a large number of lines that imitate the hatch but create an incredibly large and slow file. Dunno if I'm creating my PDFs wrong in some manner but they're awfully slow in Illustrator compared to PDF line drawings taken from the net imported into autoCAD. I've =tried reducing the file size with acrobat pro, but they still come out massive in AI. Any ideas?