what kind/model Campi crankset do you have? "different colored lines around them" just means that some company paid to have it pantographed. is a 7403 a 8,9,10 or more spd derailleur? are you using a friction DT shifter? it may just be a fact of life that you have to 'trim' once you shift to the big ring.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk