thumb safety

So, I really like my new 5” M&P 2.0 with the thumb safety. I intentionally bought it WITH the thumb safety because I WANT the extra safety and because I have carried a 1911 for 10+ years and know what to do with it. The problem is that the soft, ambi-safety has been bumped OFF SAFE three times...

I recently acquired a used Taurus PT1911. This is the second 1911 I've owned, the first being an old systema. Neither of them are high end 1911s by any stretch of the imagination, but still fun. I'm not a gunsmith, but I am technically inclined, and like tinkering with things to understand...