I did some ungrades when I first got my Bianchi. In retrospect, it was likely a waste of money. I would suggest just waiting until the part fails. A few grams of weight savings here and there on an FX is not going to be all that noticeable. Assuming it's shifting okay now, just leave it. There are enough necessary upgrades, e.g., chain, cassette, tires, that you have to do as your mileage adds up. Just save your money for them.
Live with intention. Walk to the edge. Listen hard. Practice wellness. Play with abandon. Laugh. Choose with no regret. Continue to learn. Appreciate your friends. Do what you love. Live as if this is all there is.
--Mary Anne Radmacher