I've been thinking about getting a Glock for Carry Optics in USPSA. I was leaning toward the G45 because I shoot the 19 very well (better than I shoot the 17), but I would much prefer the 17 size grip and capacity. And since I'd be running a dot, sight radius doesn't matter. Every competitive shooter I've seen, particularly the good ones, shoot the long slide Glocks. But it seems like most threads I read here and on other interweb forums, majority of people say they shoot the 26,19 and 17 better than the 34. Why is that? I would think if there was an advantage to shooting a 19/17 over a 34, professional shooters would be the 1st ones to ditch their long slides. So what would be the advantages (if any) of shooting a 34.5 instead of a G45 MOS in Carry Optics?