When I bought my first 5XL head, it was just the head and mast, and was not perfectly aligned with the platen (0.003″ tilt for an 8″ lap). A couple of years later I sent it to Graves for alignment. Alignment is free if you let them install the head, so it only cost me shipping. This is the only service I’ve ever needed, and it was turned around in a day, not counting shipping time.
However, this was some years ago, and Graves has had some problems since, including moving the business to another site, though I understand the situation is improving.