As much as I hate to say it, a black jagged S would look just about perfect on the headtube to break up the thick orange there and give it some visual appeal. Doubt they sell them on their own though.
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Bikes: 1996 Eddy Merckx Titanium EX, 1989/90 Colnago Super(issimo?) Piu(?), 1990 Concorde Aquila(hit by car while riding), others in build queue "when I get the time"