I have a Elite 7 HDI with the transducer mounted to a stationary bracket and a HST-WSBL transducer mounted on the transom. These are connected to a SB-9BL switch to go back and forth when under way. I have read somewhere that the switch will not work with DI. Is this true? If so why didn't Lowrance tell me this. Any help will be appreciated. Thanks everyone.....crappioe1133