I just received an M4 today, it's clean and speeds seem good but has not been used much in the past few years. I've run some film through it and am waiting for the negs to come back. All seems very clean and functional EXCEPT: I'm trying to figure out if the focus patch is out of alignment: vertical, linear objects in the frame, for example, a narrow railing running vertically up the frame, does not align perfectly in the focus patch: the superimposed image is at a slightly difft. angle than itself as the two are brought together to get focus. Is that misalignment? Any references for testing alignment simply? Is an alignment necessary? Possible? Any recommendations for where to send it? I bought it on the auction site. Should I request a refund? Thanks for your help. Jeff (I did a search on this and found nothing and I need to make a decision quick).