A4 will print on legal size cardstock which wastes some of the cardstock.
It is also possible to glue a strip of paper on the bottom of the leading edge of the 8.5 x 11 cardstock which the printer will think is the margin.
The printer then starts printing on the very edge of the 8.5 x 11.
Try a 9 mm leading edge to start.
This should be close but may not be exactly right for your printer.
Be sure to set your printer for A4 before you print.
Last edited by Zakopious; 08-16-2009 at 06:18 AM.
Reason: Added information.