Why lock the retainer?
I had hard job last week to remove and restore after my old retainer locked in OEM style (punch mark). Did not help to drill, pure force to cut the soft retainer in 2 pieces and take it out. Then fix the threads, grind where the deep punch mark were and damaged the threads. Retainer is very expensive. This time greased with copper paste to make it easier to remove next time.
I cannot see how the retainer can move when the axis with distances will press everything together.