I did a work up on my Citadel over a year ago. I took off the ambi, and put on a nice black stainless checkered tactical thumb safety.
I had issues with 3 pt jams and worked on the extractor and broke the sharp edges in the chamber and hood area.
I put an extended serrated slidestop on and the black rubber hogue double diamond grips.
I complained to the Pahrump Nevada Gunsmith about the extractor, and the plant QC manager in the Philippines and I exchanged some ideas, and diagrams. After modifying the extractor and illustrating the MIM hammer had mold flashing, alonfg with a collapsed half cock notch, the Armscor gunsmith sent me a new hammer and sear, along with a new ambi safety, which is in my spare parts box. The Hammer is off a RIA so its blue, not parkerized, but it looks good, and runs 100% now. The sales rep sent me a bunch of ammo for my time,and its my night guard pistol, for home defense.
I thought I posted some comments last year about this time, before I started working on it, but here are some pics of the finished item. I left the polymer mainspring housing on her, but I have a few flat serrated blued housings, so eventually I might change the MSH, the checkered poly has a ragged feel to it at the bottom row, but it is no worse than the Kimber poly housings,at least there's no ILS!