I HAVE TO HUMBLY CONFESS IGNORANCE, AUDIO! So, I would heartily encourage you to seek an answer from either leucro or dg2100, come to my mind, as they are very knowledgable players, as they also have a good deal of time in this play. Perhaps also, another knowledgable player on our forum will be moved to want to educate you in this regard, to your advantage. GLTU. GBU. JAIME