All guns get cleaned 2X yearly and my regulars after 3 range trips. The first group this could be the only time they leave the safe. Before leaving the range my regulars all get a bore snake sprayed with CLP and wipe down with cloth.
Gotta go with the pinky extension for looks, feel, and generally shooting. My S&W 3.6 compact shoots better for me with the 15rnd magazine extension. I carry a pinky extension magazine with my other pistols that have one.
I switch between 1911's and Polymer foe my carry with the plastic being carried the most. I only have 1 Polymer with a manual safety (S&W Compact) but so far has not presented a problem. The safety is slightly similar to a 1911 safety but smaller. I shoot 1911's more at the range than my others...