I purchased and installed a Velo-Orange polished aluminum chain ring guard on my new bike. Well, the front derailleur (which is the harder of the two derailleurs to adjust) was very slightly rubbing on the new chain ring guard. I watched some online videos about front derailleur adjustments and so I moved my front derailleur slightly higher so it wouldn't rub. I must have also inadvertantly rotated the derailleur cage, so then I had to adjust that as well as the limit screws. That, in turn, slightly affected the cogs in the back and shifting so I had to adjust that. All in all things shift well and work, but things seem just a tad more noisy than when compared to before I made these adjustments. I have my one month free tune up on my bike this week and I will definitely tell them what I did and have them "fine tune" my work. So that's my achievement.