From what I hear though, separating the insert from the bezel is a task that is complicated even for RSC. Allegedly, RSC technicians snap inserts occasionally, so whatever method Rolex is using, it is not 100% foolproof either.
My suspicion is that the mysterious plastic insert retaining clip is sacrificial; i.e. one time use only. So even if I can remove the insert safely, I may need to source a new retaining clip to reverse the process. Just a guess at this point.