Yeah, thats all possible. Calas I own to. If I do Print-Designs for my personal purposes I can choose the print shop I like. So I havn't problems with PDF/X4.

For the publish companies I work, I must hold there requirements and they say: PDF/X1a, 4C. Some booktitles will be print on Digital-Print-Machines like Xerox or HP-Indigo in only 100-1.000 Ex.
There is no matter to get black to overprint or be pure.

For the big pad heights it looks different. Most of the Printingcompanies are in China, Czech Republik or other states and they work not all with our industry standards.

You know like me, there are several ways to get there.

Servus Ernie