I know over the years that I worked in photo stores, there was concerned express over the poly lens mounts, and I even had concern about a Minolta with a poly mount that I purchased for my wife, but in many years of using it and working with customers who purchased the cameras with the poly lens mounts, I have never seen one fail, I imagine it could be damaged easier than a metal one, I have just never seen it happen.

Dave Parker
Satin Snow(TM) Ground Glass