Not sure if this is old news or not but the after market cartridge that comes with the Alpha really sucks so thought it would be nice to figure out how to use the schmidt easy flow on the Alpha pen and I been doing it for a few days now. I have the proper cartridge on order from amazon but this might be a permanent part of my rotation it works so well. I just used the protective cover that comes with the schmidt cartridge. I just patiently cut down the cap cover a little bit at a time until it was a very a tight fit with no play. Cap goes on with no issues even though the ink tip sticks out a bit. Next have to try a space cartridge.