I currently have two 7612 units and two 7610 units using the ccv 20 black box and gt34uhd transducer can the gt-54uhd transducer be used as well if I remove the 34 also is there any benefit to doing this also have gt-52 on rear of boat as well but the 54 now has 2d in it is it worth going to the 54 to see fish easier on side imaging