So my new P3AT, parkerized (#JJG..), has these nice little machining marks on the front of the slide (around the barrel and recoil-rod hole). It looks like it's finger-print depth machinging. Anyway, my blued P3 (#JFY..) doesn't have these -- also, the recoil guide rod hole is VERY thick (thicker than a dime) compared to the blued P3. Anyone else noticed these machine marks on the front of their P3s? Is it a parkerized thing? I wasn't aware of any changes from the JF models to the JJ models, but who knows. PICS coming soon!