When I used to fly combat, a LONG time ago, we used to replace the open front bearing on the Super Tigre engines with a shield one side bearing. We figured we needed all the protection from dirt as we could get. Going thru my G21 .46's,
I would like to do the same. The shield one side bearing is hard to find, so I usually remove one shield from a shield 2 side bearing. Since the shields don't seal, There may be no reason to remove the shield at all. Does anyone have any experience using shield 2 side bearings?