hey bro,another good source of info is bt productions -tony labrasca or bill brown at bb organ.if's yours is a really old organ you need to check into replacining the a/c wire before it shorts and burns be blessed! that treck 2 is a good way to go for and upgrade.if your preamp is suspect or shot,trek 2 has a replacement with percussion,i think which may save you some $,i'm replacing my preamp today,1955 B3 with one from an A100 that tony helped me wih,praise LORD with the ORGAN!!!