This is my first Surefire mod. The hard part is over... I think. I assumed that the light engine would just fall out once the lower bezel section was removed, but that's not the case. Something is still holding it into the main part of the head. I can't tell if it's a lock ring, epoxy, or what. The reflector also appears to be machined as part of the head so there's not much happening on that end. Any suggestions as to how to continue? Goal is to get a high CRI P4 swapped in.