[DonVoigt]

Maybe just bad luck on the ejectors, as they failed in different ways.

The ejector must fit the receiver correctly, and they can be too long at the front - which interferes with their movement.

While they are "supposed" to be interchangeable, there is enough tolerance shift to create the occasional problem- especially with reproduction/replacement ejectors.

I think the lower one was too long, and should have had a file or stone stroke or ten to achieve sufficient clearance at the forward curve of the ejector/receiver - they should not contact there, so you have to create clearance with some combinations.