ok, so i put a new bartolini ntbt preamp in my tobias toby pro and now i'm stuck between 2 different types of bart pickups. the cf5cbc soapbar and the m4 soapbar. no one i know has ever tried out the cf5cbc and can't give me any information on it. even the local luthier here in town who specializes in bartolini said that when i showed him on the bartolini website that was the first time he had even seen it so no help there. anyone out there know anything or have any suggestions?