Adjustment of the screw for infinity focus should be okay for most shooting. If you are going to be doing closer work, though, you should check the rangefinder at one meter. If the rangefinder needs adjustment at that distance, there is a hex nut under the link arm under the front of the rangefinder parallax mask that controls close focus. You'll need a 5mm wrench to adjust it.
After you adjust it, check the infinity focus again. It may take some back-and-forth adjustment of both distances to get everything set right. Be sure that the end of the rangefinder return spring is in the hook at the top of the rangefinder mask when you finish.