Thanks Mike.
As you have correctly explained, the internal margin is easy enough to fix.
What I really need right for the application I have in mind is really a centered printing, which at this point is not available in Qimage.
And Thank you Terry as well.
I did think about cropping, but in this application that is not acceptable either alas.
I will need to decide if I want to do the super-tedious split by hand or what.
Thank you for your answers.
Marco.