Dude... it's okay, I can't hit office paper at 7 yards with KirStang's S&W 10mm and I've been shooting for years. Talk about humbling!
First off: It's a Kel-Tec PF-9, not a friggin' H&K Mark 23. You're not going to be poppin' dimes at 10 yards with that thing. Effective barrel length is similar to a snub nose .38. You also have to consider the crap sights and sight radius on top of the light weight. You've got a lot working against you here.
Kel-Tec's have never been known to be tackdrivers. I've got two, myself... and if you think you did horrible, you should see me at 10 yards with the P32. I was considering purchasing the PF-9 for a summer carry piece because it's such a great concept: tiny polymer single-stack 9mm. Quality, however, is always an issue. You (usually) get what you pay for and Kel-Tec is a perfect example. Solid design but their fit and finish leaves a lot to be desired and they
seem have more fluke guns than most.
I'd recommend the wider trigger shoe (shown on their site, it helped me with the P32) and the training yourself to hold the trigger depressed after it breaks while the weapon cycles instead of releasing it (if that's the problem and often is). I don't know how I feel about the pencil eraser overtravel stop thing, generally seems too ghetto for me but has worked for others enough to be the defacto cheap solution for the infamous Lord of the Rings trigger. I've lurked in the KTOG for years and the bell curve for their pistols is insanely wide. Some people have Hi-Points and some have Korth wannabes.
Here's the "eraser solution" if you haven't already looked at it twice:
== PF-9 Eraser Overtravel Stop ==
Have you done the KTOG-recommended "fluff 'n buff?"
== Fluff 'n Buff == Could also be described as "polishing a turd."
If I recall correctly, there was a thread detailing an internal trigger pull reduction / shortening WECSOG mod for the P-11 that you could easily adapt to your pistol. If you're willing to risk having to buy a new grip / trigger group parts (if you screw up), it may be worth fiddling around with to improve your little PF-9. You've proven yourself to be pretty handy with Nerf weapons, so I'd imagine you'd be able to unfuck this craptacular trigger.
...
I'm glad someone on TFP has a PF-9. I was waiting until someone I "knew" had one before I thought about buying one.