Have you come across Swift Prints?
Do you use DWG?
We batch plot all PDF's from AutoCAD. It's quick, and we don't get all those pesky layers in the PDF!
Yes, I use Swift Prints many times every day. Trouble is I have SP set up with 2 PDF printers, CutePDF anf PDFCreator so the file size stays the same.
I use Inventor IDW. I very rarely use AutoCAD. I needed to put a dimension on a clients dataset last week and it took me 10 minutes to remember how to turn the background to black and another 6 to switch to Mechanical Classic workspace. I'm totally Inventor orientated.
I think I'll reach out to Thomas and see if SP v3 could print a PDF to the Inventor Export PDF engine. No royalties required.