Before you have the vertical alignment adjusted, you first need to check whether it's actually necessary to do that..
The H-RF is extremely sensitive to the position of the eye behind the finder. A tad too high or too low, and the patch looks as if it's not vertically aligned. You should have your eye perfectly centered. And yes, that's hard because the finder is so wide and the shutter speed read-out so far to the left that you need to move the eye to see it.
The other factor that may be causing this is tilt of the camera. If you're not focussing straight on, but instead angle the camera up/down, you'll find that the bottom and top of the patch don't align while the center does. Angling the camera makes vertical lines come out as an 'X'..
Only if you're certain that the above doesn't apply, then it's time to adjust the vertical alignment. You can do it yourself (I did, http://www.rangefinderforum.com/foru...ead.php?t=1937
though the images seem to have disappeared.. ).. but indeed, it's not easy and care should be taken.