To follow up on this, our acoustics guys tested the combination and found it will work fine on the High Freq side but if you adapt it, the Low Freg side will not be so good. That particular transducer tends to ring the LF centered at 42Khz so although 50khz it is within its rated CHIRP range, it really wouldn't be worth the effort unless you wish to use it only for the HF side. It is best to use one of the rated transducers for the FCV588.