Ted, if you don't have a 45 degree finder (my preference over the 90), I suggest you get one or at least try one out. I find it made focusing a bit easier and it puts the image into the correct orientation - not flipped horizontally.
I just want to follow up on this with another question:
I have a 503CW with a split prism(?) where I need to align the split image.
I find this procedure really hard when photographing people (being really anal about correct focus).
What is the best screen to use on the V series?
I have some sort of matte screen for my Mamiya RZ II and that works extremely well, anything similar for Hasselblad (if so, what is it called?)
I agree with the others suggesting the 45 degree prism. When I got my Hasselblads a number of years ago I wanted to be able to focus without using my reading glasses. I called them and sent them my Rx and they had an eyepiece that I switched with the original one. Fortunately my sight is good so it has worked well for me. I suggest calling their tech department as there might be a simple solution.
The Rollei Hy6 has a fine assortment of Schneider glass available for it, and a 6x6 back. It is _not_ cheap (is that the understatement of the year?), and neither are the lenses, but it will get you full 6x6 frame autofocus shots.
I'm over 50 and wear glasses all the time. I have to remove my glasses to use my Hasselblad with the acute matte viewing screen and 45 degree prism. It's amazingly easy to focus, much better than any 35mm camera I've ever owned.