The 14k nib lends itself to this flexible modification
because of its springy nature. This customization
is done by removing some of the gold from the underside
of the tines. An 18K nib is too soft. If modified,
it would bend and not bounce back.
This is a sample done with the 14K Portico nib that
has flex added to it. This writing samples is much
enlarged. The actual size of this sample is less than
half a inch tall.