Fd compatability

Crankset FC-5503 (52-42-30) with FD Ultegra 6503.

Tried replacing FD with new Ultegra 6703 because old one had a worn cage, and the new had better leverage.

However, 6703 capacity is minimum difference between top and intermediate 13T mine is 10T.

Front chainwheel difference is 22 or less. I am...