I have '41 and a later model Speed Graphic with the rotating graphloc backs. I've used it several time for beach portraits when I don't want to take the 8x10 or my Hassey. I would really like a Horseman instead. The graphics are good entry level work horses.
It would be a good idea to get the range finder calibrated if you are going to hand hold and shoot the way they were designed to be used. You also have to make sure that it is calibrated for the lens' focal length. I have one for the 127mm Ektar which is what was typically used on these.
Steve Grimes in R.I. does a lot of my Large Format equipment work. He's one of the best.