What is the standard expectation on final size of mounted posters. We are being sent net A2 pdf's to print, mount on 3mm board then over laminate. To give a nice clean trim to final board we trim into the print by about 2mm. However this reduces the size to less than 420x594. Customer is complaining and keeps sending back saying they are too small. They wont sent us an oversize (or don't know how to) so what does everyone else do.