Hi all, I was hoping someone here could help with a general RB67 lens question. I bought a 150 F4 Soft Focus that was damaged in transit. You can see in the images below the bent locking ring near the red and green dots. The knicks on the paint were probably from me trying to initially mount the lens before I realized something was wrong. Is it possible to swap in another locking ring? Maybe one from a beat up non-C or C lens? If so, can anyone provide a general walk through of the steps necessary for a swap? Thanks in advance!