How does one remove the loading lever assembly on the shorter barrel Ruger Old Army? On the bigger 7 1/2" gun I grew up with, the barrel was long enough to provide clearance. On the shorter 5 1/2" barrel version, the Base Pin doesn't clear that retainer(?) on the barrel. It appears that the retainer, which is screwed in, must be removed in order to remover the loading lever assembly. Mind you, I don't think it's a life or death situation, but if someone knows of an easier way, please share it.