How many speeds are you running on the cassette? The 9 sp Veloce cassette goes to 28. One of our local randonneur riders runs a SRAM/Campy combo to get low gearing. Does TA make a chainring smaller than 30? You may have to get smaller chainrings across the board to make sure the derailleur works.

Not sure if you want to do business with a California shop, but you could give Joe at Davis Wheelworks a call or email and ask his opinion.