I've played around quite a bit with modifying the 9mm Glox. I've decided that the sights are all I need to change, and I'd like to get some apples-to-apples comparison before I swear to that. I think a lot of the tweaks exist so that great shooters can squeeze that extra ounce from their performance. I'm still at the level of finding pounds of performance by practicing and improving gross technique, I'm just not at the skill level where small tweaks make a performance difference. When it comes to the idea that for most people, most of the time, a stock g19 can't be meaningfully improved upon...well, I guess I'm the 99%. I'll be camping out to demand that all the shooting 1%ers give me my fair share of skillz.
Meanwhile, I focus on reliability...and the stock configuration is pretty reliable, so here I am. I still have the Vickers mag release on one gun, just because I'm too lazy to swap it back for stock. But I won't use the Vickers slide release because of reliability issues discussed elsewhere.
I also played around with a bunch of trigger group mods, but didn't measure any consistent performance gainz. Listening to all the really good shooters here, I get a vague feeling like maybe multiple repetitions using correct technique is the answer to my accuracy problems. Who know? I guess can practice during the 99%er camp-out.
There's a good one brewing in my mind that includes Doc and Bill and N2O gun finishes. (I've never met DocGKR, but when I receive the honor, I'll be disappointed if he's nothing like Steve Martin in Little Shop of Horrors.)