Thanks for your reply, although not sure what you mean...sorry.
To explain better, there is a test piece which prints a to the four corners of the hotbed. Therefore if the printer firmware dictates centre and outer print area... there should be equal spaces outside t the square frame being printed. My A8 prints this test and the left side overhangs the hotbed and on the right side there is about 15mm to the right of what is being printed. There is no brim or skirt being used. I have no idea how to check and or modify the firmware and I was hoping some G Code could be added to the Cura 2.7. Start Code that would shift the print area over by - say 7 mm.