So I decided to attempt to disassemble my M&P9 FS and polish some of the trigger components. All went very well the results are amazing and it was pretty simple. I didn't grind or file I didn't want to remove any more material than necessary. Just a cloth polisher on my cordless drill with some polish. I only wish I had done it sooner much smoother and just a tadlighter. With no previous experience with this I am very happy and satisfied. I would recommend this project to anyone.