That's what I was thinking. So if they're all half-ball hits, then I'd go with #1, since there's more pocket opening width to work with; especially on a tight table.
Great stuff, Doc. Thanks again (for the millionth time). I think you're quickly earning yourself a place on the AZB Wall of Fame - if there ever is one.
4 was my answer, both on gut feel and thinking about the effective pocket size. The whole left facing, the pocket, and maybe even the last bit of the rail all go in on #4. I think I've heard someone somewhere call aiming the OB in #4 at the facing shooting to the "pro side".
Andrew -- are you sure you aim better because of the rail? Maybe you just think you do because the effective pocket is larger so you miss less often?