Swung by the shop/range tonight and talked to another of the guys at the gun counter. Told him Glock said I needed the new ejector, gave him the part # and he placed the order for new ejector for me w/ no issues. We'll see how it goes.
Shot another 200 rounds of the Winchester whitebox while I was there, focusing on grip and stance (a little too much maybe, I was ridiculously stiff and everything was ~2-3" down and an inch or so to the left w/ the sights lined up and front dot on the bullseye, grouping was better just consistently off). While it was better on the FTE front (3), around a third of the casings came back at 6 o'clock off the bill of my hat/glasses or over my head w/ a half dozen or so ejections to the left.