After reading several reviews/posts regarding laser/light combos of various brands, I'm looking into adding a Streamlight TRL2 or TRL4 red laser to my FNS9. I'm leaning toward the TRL2 for the brighter lumens and aluminum build, but have also heard decent reviews about the TRL4. I like the compact look of the TRL4 but am leary of the quality compared to the TRL2 based on some comments. Price of the TRL4 is more appealing, but would pay more for the TRL2 if people have had bad experiences with the TRL4. I've only heard excellent comments regarding the TRL2. Will be used for HD. I have seen pics of the TRL4 on an FNS9 but not a TRL2. Am concerned if the TRL2 will stick out beyond the slide too far? I would like some advice (pros/cons) on these two from those who have had experience with them and if it's not too much trouble, could you please post some pics of each so I may compare? Thanks for your help!