I used my Garmin on my '64 Legnano last time, mainly to keep an eye on heart rate data, while pushing my 42/28 best gear. I have a "mild" heart condition that I have to keep an eye on. I'm riding much friendlier gears this time. I'm keeping the Garmin. Nobody said a word about it last time. Its a fun ride, ride your ride and don't worry about what somebody else is using. I saw an old guy (I'm 68) pushing a carbon Focus up hill with an Eroica number plate. I asked him what was the deal and he told me that carbon was easier to push uphill, as we walked along side by side. The course was very well marked, I had no navigation issues with or without Garmin. If the sight of my Garmin bothers you, dont look at it.