Full Author Name in repeated citations

Hi,

I have created an ENDNOTE style based on the Chicago footnote style.

The first reference looks:

J.S. Bach, TITLE, CITY YEAR.

when I use this reference secoud time the author field is reduced and the reference looks like:

Bach, op.cit.

whereas I would like to have full author name

J.S. Bach, op.cit.

Does anyone know how to do it?

thank you in advance for any response

Regards

kozirro