have you tried selecting "Centered" for page position in the setup section of the print dialog? Upper Left is the default, but you don't need to leave it there...
I don't see that as an option anywhere other than illustrator?
I didn't think it was the 'done' thing to print direct from indesign, I always output to PDF first!
I'll certainly give it a go. Thanks
Exporting to PDF should work, too. The exported file will be the same size as the page setup in ID, and Acrobat should automatically rotate and center on your page when you print if you check the box in the page handling section of the dialog. Set scaling to None in the dropdown there, too.
Create a new InDesign document, A4 with the apropriate number of pages.
Place then the original InDesign (File->Place). Don't forget the "Show Import Options" to be able to select all the pages of your document and apropriate cropping.
After this, you can manually put crop marks for each page to get the correct trim and export this to a PDF file.
Each time you change your source document, you need to update the links in the second file before outputting to PDF.
You have once to do some manual work for the rest I think it is quite straight forward.
When you add pages to the source document, you only need to import that page.