I bought a normal PX4 Compact, put in a Beretta Competition hammer pack with a...12? 13? lb hammer spring from Wilson Combat (I don't remember the weight but it was discussed in the big PX4 thread somewhere), put on a single side slide stop lever, larger mag release, the stealth decocker levers...great gun. It really does shoot above it's weight class. It also totally freaking disappears AIWB; the sloping curve on the rear of the slide really breaks up it's profile vs the square Glock slide. I wore one tucked in in a suit, and I could NOT make it print, even with my shirt pulled in taut over it. The Discrete Carry Clips on my JMCK holster were more visible than anything else.
Since PX4 Compacts were dirt cheap not that long ago, when you step into a used one at $200 and throw the parts above at it...you're just shy of a Compact Carry price wise, and have a gun that's all that and potentially then some. Still needs good sights though.
The only reason I'm not %100 super duper all in and sell everything and concentrate on this one...there's no ACRO/MPS optic plate/cut for it. Though I guess with the 509T and the EPS that's not such a big deal anymore if you can stomach Holosun. I'm really tempted to send it off and get a cut and live with Holosun, or maybe even spend the money and buy a new LTT worked over version fresh from Earnest's mines of excellence..
I also have XL hands and have not run into hammer spur issues or slide bite issues - but I'm also not nearly at the level of shooting as a few people here are so I don't know if it's me, a lack of practice/training, or what. Maybe it just works out for me, like some people can shoot a BHP all day and not get bit by it...I can't even look at one without welts forming and my hand starting to drip blood.
The grip slickness issue is a real thing though. Now that I'm not constantly taking the grip module apart to fiddle with the hammer pack, I could probably go back to using a Talon grip panel (their "pro" version, for sure) vs the moleskin-type thing I've currently got wrapped around it. I bought this stuff from amazon a while ago and it works really well; think a thick moleskin, or the Brooks AGrip type of stuff. When I first got the gun I put the rubber Talon grips on it with the medium backstrap, quickly realized I needed to swap to a large backstrap, then I needed to reseat something in the hammer pack, etc...I wound up removing the Talon grips because I was constantly removing the backstrap and stuff. This microsuede stuff was a LOT cheaper, and I could reapply it several times; I made a template out of the backer from the Talon grips and used that. I've had it on my gun for maybe 3 years now and it's held up though the edges are getting a little frayed. It's not really grippy if your hands are dry (as an IT guy in climate controlled rooms, your hands can get really dry) but starts working better as your hands get more hydrated, even outright wet they work great.